I'm toying with running a one-session game for two players. Initially I wanted to use Sorcerer, but all of my Sorcerer play has been "indie long form" (i.e., 5-6 sessions) and I'm not sure how I'd have to twist it for shorter play. On the other hand, Dogs in the Vineyard and Mountain Witch seem to run pretty well as one-session games. Burning Wheel, maybe not so much. People have been talking about how you can play out a whole adventure of "Red Box D&D" in 3 hours or less, including character creation.
What's the deal here? Why do some games work better in such a tight timeframe than others?
Also: Judd, if you're reading this - I know you've run a bunch of "Dictionary of Mu" games at conventions - is there any trick to running a satisfying Sorcerer game in 4 hours or less?