[blam]

Probably similar to the Neanderthal diet.

[sawmill trash]

Probably pretty much whatever they could find that didn't eat them first.

[Rytwyng]

Neanderthals ate nearly all meat and fat -- they largely lived in very cold conditions where the plant life mostly wasn't useable (directly) by mankind. So they hunted large grazers and fat bears.

Whereas the reconstructionist was analyzing southwestern Natives who lived near a river, hence the cactus, fish, and various desert plants. Even in a desert, there's a lot of useful plant food -- more than the ancient mammoth steppe. However native diets, before agriculture, were ALWAYS high in animal products, in ALL parts of the world, even the warmer areas.

Interesting reading: Guts and Grease -- the Diet of Native Americans. Paleo-European diets were similar.