Well, here is the thing. Yes, there are a lot of people around, but nobody knows whether they are real or not. As you can see in
this video made by Nostalrious they are more than capable of emulating players and they are actively doing so for their testing.
Personally I don't take a stand for either side. I mean there's over 200 people in my guild alone and I know about another guild with over 150 players as well. That's way more people just on the horde side than there was on my last server, so I'm pretty sure I can play just fine even if the accusations turn out to be true.
So stop getting your jimmies rustled and just enjoy the game. I know that I will!