It's really all dependent on what kind of party and players that you have.
I had some tough times in Qarn, before I cleared it roughly two months ago. Aside from learning the boss mechanics and overall layout of the dungeon, there were times where the parties that I joined with on DF just didn't mesh together as well. I also had parties where we smashed through bosses and trash mobs, alike. Thankfully everyone I met in those instances had great attitudes, even when we couldn't clear the Tetrasaur (sp) and had to bow out of the dungeon after over an hour.
