I ran 5 druids (bear+3moonkin+tree) through heroics for a bit. Got some badges and my first piece of badge loot on 'em. Then switched to my pally+4shams group. Seriously, the pally+shams group feels like I'm already in epics compared to the druids. AoE group HoTs 24/7 + antifear + all the resists + grounding totems >>>>> MotW + shapeshifting. After doing it for a while, I pretty much gave up on the druids. Shams just have so many gimmicks (aka utility) to nerf certain boss mechanics that it's crazy.

Short version: druids are very capable but you'll have to work much harder than tank+shammies groups.