She also ran most of her Cata heroics yesterday, and is probably one valor piece away from HoT heroics. It was a LONG day. Many wipes but she got her achieves for Blackrock Caverns, Vortex Pinnacle, Shadowfang Keep, Deadmines, Halls of Origination and Lost City of Tolvir. Whew! With only a few exceptions, all of the PUGs were very nice and helpful with those who didn't know the fights.
I picked up on another issue for hunters: traps. From my experience, if you are mostly questing on your hunter, you have little use for traps. Then you enter heroics for the first time at level 85, and traps are a very important CC skill. So if you are a new player, you may have very little experience with how and when to use traps. Overall it seems that there are so many little things that hunters need to do differently in dungeons vs questing; hunters may be an easy class to level with, but they are much more difficult to play in groups.