I've got about 260th/s pointed here and I've been mining here for 2 years. When I joined the 5nd was like 36 hours and made way more sense than it does now. I would agree that 5nd could be shortened to 3nd or even a 1nd with our current hashrate. I think it would attract lot more new miners. Every time I have brought this up in the past it was shot down. Kano was against changing because it increases the variance and would be to the detriment of those who already reached the 5nd.