I've seen quite a few complaints about the damage numbers in the demo being higher than they were in Vanilla.
Insofar as the private servers are an accurate representation of the vanilla data, I think we can disagree with that assessment.
We must factor in that in the demo everyone is starting with quite a few greens, and all of those greens seem to be class leaning specific, especially the most important item for dealing damage -- the weapon.
I saw one particular complaint that a 2h enhancement shaman in the demo was able to crit for over 100 damage and that this wasn't Vanilla-like. I was able to replicate this multiple times on a private server with far inferior gear to the starting gear of the demo.
I imagine the results would be similar for all other classes, especially considering the starting gear.
How did you replicate that when Shaman at that level could not equip a 2H weapon ?
In vanilla it was a talent point. In TBC it got moved to a trainable skill. The demo had the TBC version.