Katt -- So that at least would address the various claims that we were all somehow vegan in the past. (But most of the pro-vegan arguments seem to be based on ethical claims rather than nutritional history... I mean we don't need to look back far in history to prove that people eat meat. They're doing it now!)
joerandom -- this is why I wish for some nice, large sample size, scientifically-valid studies of eating and health (weight loss or heart failure for example) that actually include a primal-type of eating. RE: heart failure, there are lots of existing studies claiming red meat is bad for cholesterol but it's always in combination with people eating non-primal carbs, so there's no good variable isolation. If, as so many here claim/believe, the non-primal carbs are causing this inflammatory reaction that makes dietary cholesterol less safe, it'd be great to have more scientific evidence there.
The individual experience is anecdotal but it's still important for the people who find encouragement to try this and then discover that it does work for them (for whatever their goals are -- lose weight, avoid diabetes, get off heart medication.) That's probably true for any dietary or health modification approach, there will always be people who feel that it works for them and others who don't find long-term success like that. (look at all the ex-veg*ns here for example, or people who tried a bunch of other diets before settling here.)