I don't know about this particular diet, though it is a fact the way your body looks depends almost entirely on what you eat and your genes. There's little point in doing hundreds of crunches. Unfortunately, as a woman, your chances of getting the 6 pack look are next to none, unless you have great heritage.

I wouldn't dismiss abdominal workout though, there's more to it that just getting the flab off (which as I've said doesn't really do the trick anyway).