yes i set mine fast by about 7 minutes. the reason is that when i FIRST wake up, i am very out of it. like for 10 seconds or so I really don't know whats going on, and i see the clock and am not aware that its fast. after that 10 seconds or so when I am back to reality, i realize its fast and am up 7 minutes earlier and not in a hurry.
its all a mind trick that works because when i first wak eup, im like half awake half asleep and by the time i realize the clock is fast, i'm fully awake w/some time to spare.