Sure there are some that do 8iu's per day. They are usually older though, not in there 20s. I am actually up to 6iu's now 7 on 0 off. I just buy less beer. LOL
And to add to yonkers, the reason for 5 on and 2 off is due to the cost. Unless you can afford to go 7 days a week than the 5 - 2 is standard proceedure.