I don't understand why a bunch of people have a problem with the numbers. Of course not all of them are paying $15 a month. But, WoW products have been in the top 10 PC game sales forever month on month, along with The Sims crap. So what if you take out the chinese gold farmers, and the internet cafe people, it still leaves plenty of millions of subscribers and plenty of money for BlizActi. Its like saying OMG apple only sold 4 million ipads instead of 5 million OMG. So what, does it really matter?
Also, look at the financials, they were broken out when blizzard joined activision, and they support those kinda numbers. There's NO evidence that blizzard is way off base about this, and plenty that they are close to accurate.