With all due respect, your few data points are hardly a representative sample of Google's workforce. I fully accept that women aren't represented in CS degree

With all due respect, your few data points are hardly a representative sample of Google's workforce. I fully accept that women aren't represented in CS degree courses, and this may be a good argument for the under-representation of women in Google's workforce. For foreigners and people of a different race, it's more difficult. Tuition fees for foreigners is higher, so I'd be willing to believe the are fewer foreign students studying CS than domestic students. For domestic students of a particular race? It's still not entirely clear to me.