What about them? They eat more and differently these days, and accordingly, Okinawa's life expectancy has fallen.
I was thinking about the pre-WWII Okinawans. Anyway, isn't what you mention further evidence that CR works, even below the not-morbidly-obese line?
I recently came out against paleo in the open thread, and realized that I probably haven't yet heard the strongest arguments in favor of a paleo diet. So, what are said arguments?
EDIT: Or more generally, why should I eat less carbohydrates and more protein / fat?