Google's Diversity Matches that of the our University Graduates
If you look at higher education statistics by race and sex, Google is pretty much spot on, especially when you consider the fact that they have a ton of offices overseas in countries where there is pretty much little to no racial diversity at all. 75% to 80% of US graduates with degrees are considered white and 40% to 65% are female. The females employed there may be low, but that's because of the recent increase in female graduates which was previously at 45% (2009) and has been below 50% for years (I looked as far back as 1999). Google needs females with both an education and experience but new female graduates haven't got years of experience so they have a low hire rate. Also Asian's have a the highest completion rate, highest scores, and lowest dropouts of any other race in the US. It stands to reason that Google employees people based on education and experience, rather than being forced to hire and equal number of every race and sex, therefore their race & sex diversity figures match that of the widening diversity gaps that we see in education statistics. Employers that are forced to hire all races, even if the workers have zero experience, will have more diversity, but run into hurdles when in need of educated/experienced business decisions, most likely resulting in a failing business structure. It stands to reason that Google wants to be a successful business, therefore they tend to hire the best employees for the job without favoritism or discrimination.