It's only a controversy because you want it to be one.
There, I said it. People are whining and complaining because they're probably have been bashing WoW for the last 6 months and can't accept that:
1) It sold almost 3 million copies in a week.
2) It actually grew to 10 million.
So instead of enjoying their own game, they have to spam the forum to bitterly disprove that they have 10 million customers.
The ways they do it are pathetic, people have even gone as far as calling Chinese players not real players because we don't encounter them in-game.