Tank's a moron, that's obvious.

I pug with my 3 frostDK's as triple dps. Can't say that hasn't been succesful. Had 1 crapgroup, where the tank waited so long before every pull without any reason (healer full mana, everyone close to tank) that the pulling took more time then the actual killing of mobs. Then I tell him that he should speed up a bit and on the next find the the tank dies without no reason. After waiting over a minute after combat ended (I tanked after he died) the Healer still didn't ress the tank. I quit then.

That was the only negative group so far. Quite amazed myself how well it went, so far people really know what they're doing and we're rushing through the instance. Tank pulling multiple packs + me AoEing = profit.