I read it wrong and didn't take into account normalization. However, even if there are a lot of hunters/warriors. Why would their %'s be so low? And don't say because most people who play those classes are kids.

Edit: I read the link thoroughly and the example given is a small sample size. The sample size from Blizzard is large. And that even if there are a large number of people who play certain classes the percentages still reflect accurately. For all we know, there could a comparable amount of Warlocks to hunters but Warlocks percentages are still high in the chart. Correct me if I'm wrong.