[dragonwriter]

> There's little evidence that IQ and programming ability are correlated.

Yes, but while programming ability is no doubt a priority for Google in programming positions, its not unlikely that general intelligence is something they desire in a broad array of positions (including programming positions.)

So, its not entirely implausible that, to the extent that there are group differences in IQ distribution, those play some role in explaining Google's diversity results (of course, IQ is not purely innate and does appear to be influenced by a number of environmental factors, though those are even farther upstream from hiring than the kind of things that Google is focussing on with regard to educational opportunities in computing for women and minorities. But there is no reason Google couldn't work to improve those, too.