But keep in mind also that Blizzard is watching the Tournament realm closely for PvP balance, so what we see here could have some hints into the future of Arena changes. Mages especially don't make out too well on the 5v5 chart, and Hunters don't appear to fare much better. Warriors, as you might expect, are off the charts, but comparably on 5v5, Druids aren't at that level. Rogue placement is a surprise, too, but Vhiari just says in the comments that that's more an indication of how many people rolled rogues on the TR rather than a signal that Rogues are rocking 5v5.
Interesting stuff. Unfortunately, the data is a little too fuzzy to pull off any serious conclusions (even if Mages aren't getting high ratings, this chart does nearly nothing at all to help us figure out why that might be), but it's an interesting look at what's happening on the TR so far.