I do have to agree with PB though, maybe just tone down the whole "Peace, Love and Goodwill" thing, it will make your information a lot easier to digest.
I think a lot of people miss the point of IF entirely, they dive in with all the determination of a STD CW dieting program, force some reluctant changes in their bodies, then finally when their body really arc's up and refuses to play ball, they declare IF as a dismal failure.
Most of the good information I have read about IF consistently warn against trying to force IF, it should be a natural progression of moving into the Paleo/Primal lifestyle, basically simulating life without a fridge & pantry. There are numerous benefits to be gained from IF, but it can't be forced, it requires one to get in tune with their body first, so it should be a gradual process, some can get there in weeks others may take years or it may not even be appropriate for them. Women generally seem to have more success with the shorter daily fast and I think this is an inherrent response to the fact they they need to maintain appropriate body weight for pregnancy and hence will down regulate metabolism much quicker than men who on the other hand need to maintain full metabolic capabilities so that they can perform their full duties as protector/hunter etc., this is at the expense of fat reserves, they only need enough energy to copulate so have no underlying driver to hold onto fat.
Anyway, that's my take on it at this stage, but still looking for more info.