The trouble with this whole smart-arsy discussion is the usual Western 'cultural superiority' syndrome.
Doesn't seem to occur to most of the commentators above that 'IQ' as measured by 'IQ tests' is a measure of what is important in 'Western' cultures, namely abstract thought & logic & reading ability.
So where does that leave people like the older members of my Khmer peasant family who have never been to school, have never learned to read & write, don't know what a world map is that I pinned on the wall of the new house I built for them a decade ago etc etc. Does that mean they're 'stupid'? 'dumb'? unable to get thru life successfully? ...
Well, it would be interesting to see who would cope better in the rice paddies and in other food-production processes following a major war that cut all international & many intra-country supply lines. I wonder who would be laughing then?