playBunny: I agree with playBunny that the average can be misleading.
The following is an example of how my play could give a misleading version of my rate of play

I have a tendency to play "next game with friend" and when I am online with the likes of Pedro Martinez for instance or AlliumCepa who are both on my friends list, it is common for me to play 100 or so moves against either player in quick succession to the detriment of non friends still waiting for me to make moves in my game.