Our bodies remember the cave man days and are programmed to eat the way you lined out.
This was pretty much what was said by the talking heads in that documentary, and it makes sense. As a species, are bodies ate animal fats and proteins for over a quarter of a million years. We've only been agricultural for about 4,000 years. Our bodies aren't meant to digest that much wheat and corn, it's not natural.
Caloric intake and exercise are crucial to making this type of diet work though but the results can be a lifetime of heath and fitness.
Because of the energy surge, I'm exercising at least twice a day, and sometimes three. I've been riding my bike, as opposed to driving my car, to run local errands and the results are striking. Another benefit is that I'm now having at least 4 good REM sessions when I sleep, as opposed to maybe 1 every other time I slept.
An occasional treat is okay once you reach your ideal weight. But, don't be surprised if your body reacts negatively (bloating or gas for example) if you do.
I've already experienced this, luckily I'm not too interested in eating these things at the moment, so I'm not woried about this.
One major thing I've noticed is that now that I've cut out refined sugar, my taste buds are becoming more acutely sensitive to sweet things, and I'm able to taste the natural sweetness in certain foods. From the time I was a child, I ate copius amounts of refined sugar, and I think my taste buds had become saturated and deadened to it. I mean, I used to put sugar on Cap'n Crunch cereal.
I freaked out my wife last week when I took the lemon slices in my water glass and ate them. I have never been a fan of tart things, but my taste buds could now taste the natural sugar in the flesh and the tartness didn't bother me anymore. My wife almost fainted!