Of course "moves per day" would not tell you much. But "moves per day, per game, per game type when it's their turn to move" would tell you alot. If it was averaged over a 3 month period you would get a fairly good idea of their tendencies. Thus, if someone averages one move every 5 days for the game we want to play I can take a pass instead of getting stuck with a game lasting many months which suits only one of the players just fine.