Although i'm pretty sure that you needed a good CPU to play WOW when it was released, i could be wrong?
Every now and then Blizzard comment questions if they are going to update the graphics with nonsense like "we want everyone to be able to play WOW". My four year old CPU can play WOW in ultra setting, although perhaps not as smooth as my high end CPU. Heck, even my 8 year old computer can play WOW at 1024x1080 at high, smooth. I mean, i can't think of anyone playing with a much older computer than my 8 year old CPU, really! If some people are to poor to buy a second hand CPU for 200$ that can easily play WOW very smooth, they shouldn't even pay the subsciption fee in the first place.
I'm not sure which amazes me the most. That ppl seem to play with stoneage 486, or that their CPU that are possible older than most users on MMO champion, are still up and running.