[btilly]

I read the article. Here is my personal reaction.

The sample size is indeed too low to have the statistical power to draw any solid conclusions. However it could be large enough to produce a set of candidate genes which reasonably might have small individual impacts on IQ. If you then could do a follow-up on a large population just looking at those genes, some of those candidates are likely to prove out.

It is a fishing expedition. You never know what you'll find. The odds that you come back empty handed are high. But it is still worth doing.