Yes, I'm copying and pasting from one board to another, but it's my post so :-P~~~~~

If a person is playing in many different games and tournaments with many different time limits (and doesn't always have time to live on the computer), it's only natural they will play the shorter times quicker, and more often. So if a player plays his five-day tournaments within three days, his 15-day games within 10 days, etc, he's using roughly 60% of his time limits. So if you set up a tournament with a seven-day limit, and you want people to move within 2 or 3 days, you only allow people who take an average of 20% (or less) of their time limit. That way you have that 'buffer' of time that folks go on about so that 'if anything happens' people will still have 7 days to make the move, but most will be taking it earlier.