Should be ready soon. I just got booted saying the game was out of date and to patch the game. 11:50 pac time.
Edit.
11:58 pac time. NO PATCH. NOTHING. Can’t play game.
Edit.
12:03 pac time. Updating.
Edit.
12:04 pac time. Game now playable. WOOT!!!
Edit.
12:05 pac time. Confirmed. Just logged on to HC Monk.
Same problem for EU. 
Getting ready to delete about a page of Inna gear, lol.
Update applying now, Americas
Patch live, EU.
Looks like it went live at 12 noon PDT. Almost like someone planned it or something… so, given Blizzard’s track record, anyone want to take bets on something being catastrophically borked? Heh.
Wow… so far nothing but goodness… ran a couple of GR110’s in HC and landed a Petrified Scream on the second. And all the wizard gear worked like advertised. Only thing odd is the leader boards claim to be locked for maintenance. No idea how long that’s going to last.
The patch is ready now and it is version 2.7.4.84161