Best pacelines and pulls I've been in have involved pulling off nearly immediately after getting to the front. It makes a smooth, fast ride. No riders have issues jumping off the front if they're too strong, or slowing the group down if they're too slow. You make it up to the front, then rotate right off nearly immediately. Works great.

I can't stand pacelines with long pulls - there's invariably one guy who misjudges his strength and slows everyone down big time. It's a lot less of an issue popping off the front if you're a group with similar ability, as the draft effect will usually keep you honest unless you're intentionally sprinting to make a gap.

I tend to do what the group is doing, so if they're doing longer pulls, I'll do one too, but I def prefer rotating right off. Avg pace will definitely be faster.