I've been doing this for a few months now, or 6:1 at least and haven't really noticed much of a difference, though I'm assured there are health benefits there somewhere.

Do it on Mondays since it's always a shock to the system after the weekend, so figure I might as well throw another problem in there too.

Mate of mine went from a rotund chap to seriously tiny in 4 months. That was full 5:2 & running four days a week though, so understandable.

http://en.wikipedia.org/wiki/5:2_diet