Personally, I have two expectations when I DF any content:

1) I expect that I cannot expect a speed run.
2) I expect that I will be waiting for people to watch cutscenes.

I go into DF with these two expectations every time, whether I'm playing a 350 main stat character or a 500 main stat character. If I want a speed run, it's my responsibility to make or find a party with that goal in mind; not to thrust my wants on the people the system matches me with.