in fairness, right, you never specified that amount, but the conversation had mentioned a man that went from 30 something to 50 kg and another person that said they were 'emaciated'. I supplied the upper value. When you replied that "raw foods seem to constantly cause weight-loss" and that "If you do indeed have a little extra flab on the stomach, that would indicate that you were a little above your ideal weight" no matter how thin otherwise it seems to contradict that paleo man had size and strength eating only raw foods not including 'dairy and fermented grains'. Your point might be accurate for those being 'over-concerned' but overall, paleo man couldn't have been both 120 lbs and strong in the ways the article describes, no matter how devoid of toxins in tissues, so I'm less interested in proving that paleo man was weak in that I find the other comments incredibly baffling in comparison to what should be 'normal' for eating naturally and having an appropriate amount of activity.
The thing is, the only raw food that seems to promote weight-gain is raw dairy, which is a non-palaeo food which commonly causes other unpleasant side-effects re health. I don't discount the possibility that some Rawapalaeos might have less than ideal weight, but I do seriously question the notion that eating excess amounts of raw foods on a constant basis is a solution as that didn't happen in palaeo times(it wasn't necessary). Now, it may be that some people, due to the abnormal effects of modern lviing, re chemicals in the environment/unnatural lifestyles/lack of (proper) exercise/genetics, have this issue, so might have to resort to unnatural methods such as overeating. As for being 120lbs and strong, it is technically possible, I suppose, if you were an African pygmy. But the point is, that , weight-for-weight, palaeo peoples would have had more functional strength than modern peoples.
as for the other stuff, according to the expert that you posted this is not true. Either way, this seems - to me - to be far more confirmation of natural diet and makeup/structure which cannot be improved otherwise than the actual activities and techniques which it seems to suggest does to a large degree [edit: make us more formidable]. Otherwise contemporary humans would have not even a remote chance with poor foods and inheritance AND their 'poor modes of activity', and would be FAR surpassed by the added superior primitive activity as well as biology, and that doesn't seem to be the case, at least according to this article.
Well, the above article's author was stupid in suggesting that our palaeo ancestors would need shoes in order to compete with us. A far fairer comparison would have been to compare our barefoot modern selves with our barefoot Cro-Magnon ancestors, which, judging by that article's claims, would have meant that modern athletes could not possibly have competed against our Cro-Magnon ancestors. You have to bear in mind this guy was comparing the performance of an Olympic athlete in modern times to the everyday activities of average palaeo tribesmen, not necessarily the best representatives of their tribes, in terms of physical performance. Yet, they still were able to beat Usain Bolt, on a barefoot level-comparison, with Usain Bolt and the rest merely supposedly "winning" due to artificial enhancements(ie shoes, and no doubt steroids as well).
Same applies re genetics:- if we took a cross-section of the modern population and compared them to tribes in palaeo times, you would find that the modern population have much higher rates of genetic diseases/weak genetic make-up etc., making them, overall, far less impressive physically etc. This is because, in palaeo times, they were still subject, to a certain extent, to natural selection re weeding out undesirable traits, whereas modern medicine now allows many such to stay alive and breed.
Simply put, we are a weaker lot than the Cro-Magnon, and have to compensate with the use of steroids and other performance-enhancing drugs.