The fast games have a 10 min move timer. We are thinking of reducing it to 6 minutes. If you leave the app to do something else on your device then you drop out of the fast game queue. Not many people play fast games. People probably play an AI game while waiting for people to join for a fast game.
I'd love it if the timer dropped to 6mins or even less. The one time I actually got in a fast game I had to drop from the final round or so after three hours of playing.
How often do fast games actually happen though? The last few times I've tried to join one I'd have my iPad sitting open in the queue for about thirty minutes and no game started. This usually in the evening central time.