The effect he's talking about is not medical, merely statistical.
The larger the population, the greater the chance for a > 0
measurement at the far right of the bell curve. While one might
be able to calculate an expected maximum age of a particular
population, it wouldn't really be a meaningful piece of information
because it would be based on the empirical properties of the
curve we have now, and there's no reason to suspect that those
would hold for a different population.
-- Lee Daniel Crocker <lee@piclab.com> <http://www.piclab.com/lcrocker.html> "All inventions or works of authorship original to me, herein and past, are placed irrevocably in the public domain, and may be used or modified for any purpose, without permission, attribution, or notification."--LDC