AbigailII: I know it's not perfect. But actually with more games going you would have more chance to play quickly. I frequently don't have any games where it's my turn and am slower than I otherwise would be. Someone with 900 games going would never be in that situation.

Anyway, it's just an attempt to rank players by how quickly they will move in a given game. If you can think of another way to determine that I'm all ears.