There isn't a lot there that surprises me much. I wasn't expecting 51/13/7 to be the most popular DK build, though; everybody seems to be talking about dual-wield builds, which this decidedly is not. Balance comes in much lower on the Druid specs than seems to be the case on my realm, but my experience might just be biased.
As tipster Waluigi mentions, DPS specs dominate for many classes (notably Paladin and Priest). However, Resto is the most popular shaman build, and a tank build is most popular for druids, so this is not the case for all classes. It'll be interesting to see how this develops as more people hit 80 and get to endgame activities.