Actually there is and it's well documented but it's of course you have to neglect the experience of other people because you disagree. I guess it's hard to see if you've never seen it fanboy. I'll give you one minor example to show how bad it is that it permeates all aspects of the game. You cannot level skinning 3 as alliance until 120, horde can do it at any level. Yes this is a minor and almost meaningless imbalance but why is it in the game? Because the bias is real and they don't care.

But regardless I'm gonna take ions advise. If you wanna play blood elves the horde is always waiting there for you. And I can't wait. Sad to see the game turn out this way but it is what it is. Until blizzard takes real action alliance numbers will continue to dwindle to role players and asmondgold.