People had been complaining about Feral Druids geared in AQ40 / Naxx loot loooong time ago. I have a guildie who was geared in those instance loots with 1500 atk power at lvl 60... I shudder to think how he would do with level 70 gear.

It's not uncommon for Feral Druids to run into SM Cathedral and pull the entire garden and tank all 10-20 mobs at the same time.