Over on the PvE side of the fence, (drawn from the top 5% of raiding characters) we see that Blood DK's and Guardian Druids are the most popular raid tanks, but that all tank classes are fairly close together save for brewmaster monks. I don't know why but clearly they're not taking off as tanks yet, perhaps due to entrenchment. Most raids tend towards established tanks, after all. For DPS classes, fire mages and shadow priests are the most popular, followed by beast mastery hunters and affliction warlocks. This is interesting when contrasted with the actual state of DPS classes in normal and heroic raiding atm. Rogues are interestingly split between assassination and combat, keeping them from challenging any of these classes. As for healing, restoration shamans and druids and holy paladins seem to be on top, but discipline priests look strong as well, with mistweaver monks trailing behind.
You can head over to GuildOx and dig around for yourself.
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