This is 100% Valid.
Im sure Blizzard thought of this when introducing the new system. When they did they no doubt saw 
. Mainly giving folks more of a solid reason to spend said on server transfers.
Blizz Response to your Concern: No problem bro. I got you. Server transfers are here for you 
Yeah, Shifty, I think I am going to do that. I ran into so many errors for hours last night trying to pay for that guild transfer that I humorously believe that it was âa signâ from whatever divinity exists telling me to NOT spend my money and just sit tight and wait.
You canât test it in beta. There is no cross server ability to test it. Someone just attempted that yesterday. Beta servers arenât connected like that. So I have no idea what youâre testing.
Around here, people expect information to be given by the person providing it. I understand thereâs a lot out there. But I wasnât being snarky towards you.
And nothing in that link you provided says you can give guild lead to opposite faction or cross server.
But nothing verifies what was asked for.
Just yesterday someone attempted to test it and you cannot create cross server guilds on beta. So Iâm not following how this is being tested.
Look, Iâm not trying to be difficult here. Iâm just looking for a blue post that tells me guild lead can be given to another realm or cross faction.
Yes there is. There are multiple realms in beta. But none the less here is your info. Top of blue post. It was testable as of the 19th
Okay, I can see you didnât read my post. So letâs try again.
That link you provided doesnât say anything about being able to give guild lead to someone on another server or to the opposite faction. And here you go, from yesterday:
Yes I have. You are not reading what myself and many others have said in this thread.
The Guild it self is NOT on a server AT ALL. Its also not tied to a Faction AT ALL. So why Couldnât you? Stop being daft. In the War Within guilds are NOT on a server or Tied to one in any way.
Im sorry the person you linked couldnt figure out how to test this. Me and Tinkerbells had no problem testing this in Beta and neither have many others who have replied in this tread. Its almost like you didnt read their responses
Yes it does mate.
Here is more info for you
This is why they are Retiring Guild xfers and Faction changes. They will be a Mute point since Guilds are no longer Faction or Server Bound
Is that because all the beta servers are linked unlike all the live retail servers? Seems like skewed results.
Posted plenty of info on this coming from Blizzard them selves. Not my fault if folks are too dense to understand it. As usual it seems some folks need things spelled out for them.
Sorry if this sounds harsh but its brutally honest
They do, youâre right, and blue posts should be the ones spelling it out.
If beta servers are all linked then yeah it will work no problem, but on live retail servers where not all realms are linked, then what? Does this imply all realms WILL be linked? Sounds like a good time for blue citation.
No implies Guilds will not be server bound or faction bound. My guess is the only thing actually ON THAT SERVER is the Guild name.
You are not wrong though. Would make things simpler if a Blue said. NO your guild is not longer stored on a server
No. It doesnât say anything about transferring guild lead.
Youâre getting nasty and Iâm just looking for a blue post that specifically says leadership can be given to someone on a different realm or opposite faction.
According to those that tried yesterday, they arenât. So Iâm confused on all of this.
Me and Tinkerbells tried it. I had no issue promoting my Alliance toon on another beta realm to GM when my Horde toon created the Guild. Sorry the ONE PERSON your linked couldnât test it.
It comes down to trying to figure out something that blizz clearly has yet to disclose to everyone as if they are holding it back until launch to talk about it like some grand surprise feature.
Of course you didnât the beta realms are all connected. 
Except Guilds are still faction bound in live. So you cant. They are also server Bound. Its quite clear they wont be in The War Within
When there are people saying it can be done and people saying it canât be done, then something is wonky and means itâs bugged one way or the other. And I read through the entire Q&A and there is nothing that states it from a dev or blue.
You need to understand that this is something people donât just want to assume. As you said, it would be nice if there is a blue post to confirm this. But there isnât.
Thereâs no reason to get snippy. Iâm not being snippy with you. Iâm just looking for confirmation from Blizz.
This is what concerns me. 
That would be the only thing I could see an issue with. I know in re-mix you have to fly to the actual location if you have cross-faction in the group to enter if you want to run Looking for Dungeon spam. Or maybe you start out as an Alliance member on your dead server, join the cross-faction guild (maybe not knowing) it was Horde based and you find the above issues but donât want to change names or classes and decide you want to change faction (honestly donât know how this works if other faction doesnât have your race), because you just donât want to change mains and level a new character.
I know in Ever Quest 2 if you wanted to play an Ogre which was evil aligned, you would start in your city, quest to become neutral then quest to become good and could join the guild that was on the opposite faction. Also meant if you played, say a Death knight, you now became a Paladin once you fully joined the opposite faction.
Starting to get a Plunder storm fiasco feeling.
NO WHERE has that been said except by YOU.
Your right but every single blue statement implies it. Heck its even in the name. Cross Realm Guilds
I havenât seen anything that implies as such either.