Epic is the best for an enjoyable game, regardless of scores. Compared to civ3, civ4 slowed down unit movement while drastically increasing the speed of late game techs. That combination makes the game less fun, IMO. But yeah I don't mind if people want to play the same game under normal, but they'd be handicapping themselves and I don't know that people would do that willingly, even if they have time constraints. One issue with that, though, is that the game date doesn't really match up properly between speeds. So fastest victory would have to be calculated using turn number divided by max turns instead of game date, or something like that.