The trouble with the whole Weston-Price notion of native tribes supposedly being healthy is that it's false. First of all, many of the tribes he studied ate widely differing diets(varying from grain-filled diets to diets of seal-blubber etc.), so that it is ludicrously unlikely that they all had the same level of perfect health that Weston-Price tried to claim. Secondly, a lot of his statements come apart, under examination. For example, he claimed that the Maoris thrived on their primitive ancestral diet, yet, according to NZ anthropologists who studied Maori bones, Maori health was pretty poor , and lifespan very short, prior to the arrival of the British. Then the British forced the Maoris onto poor land where they could only grow the grain-portion of their diet and had no access to animal-food, where they started to suffer even further, and then, only c.1900, did the Maori population start to recover, at which point they'd turned to a Western-style diet, ironically. Many other tribes he described have, instead, been shown to have led lives that were "nasty, brutish and short", according to other anthropologists.
(I don't deny that native tribes, as a whole, had far better levels of daily exercise than modern humans, so were fitter than modern humans, but that's about it, really).Oh, and the notion that Weston-Price's diet justifies cooking is false, as he pointed out that all the healthiest tribes ate at least some raw animal food - which implies, that the more RAF in the diet, the healthier they would have been.
As for the argument re centenarians, I disagree that diet is responsible for their living that long - though I agree that will-power (and modern medicine/surgery) can do wonders to keep people alive for far longer on cooked-processed diets than otherwise would be the case) . Turning to a raw diet would mean a much lower toxin-load(there'd still be air-pollution and the like) and therefore a much longer lifespan, provided that the environment wasn't too harsh. I wouldn't be at all surprised if 100% RAFers manage to live till 150-160+, if they started out rawpalaeo from birth .(I won't likely live past 100, though, as my body's resources were so damaged and exhausted after years of eating cooked-foods that even turning to this diet wouldn't lead to the kind of health I could have experienced if I'd been rawpalaeo from birth).