I mean if you want a real answer from me, my answer is:

if it's a dungeon run or a DF run (aka not a raid or PF with a set goal etc).... if no one's dead and nothing is chewing my face I couldn't care LESS if the tank was DPS stance or if the healer stood there and took a nap. Dungeon run takes an hour? Fine, if we actually finish. I don't care.