Is there any benefit to a raw food diet?

All that I know about raw food diets is what I have picked up from the Web, which is not much. I have not found any discussion of it from an unbiased scientific point of view. Are you or anyone that you know on a raw food diet?

My “gut” reaction is that it probably makes sense to have some raw foods in one’s diet, though I have no idea what percentage this should be. I would guess that there is no society that does not do cooking. Hunter/gatherers must cook most of what is hunted and possibly a portion of what is gathered.

On a related issue, Macrobiotics advocates say that raw and cooked foods should not be eaten together because of differing digestion requirements. I find this (sorry) a bit difficult to swallow. I would think that the digestive system should be able to handle together all kind of different foods.