It is not uncommon to see high tech, largely programming related companies filled primarily with men who are white or asian. Honestly, my programming company is the mostly men, mostly white.
70% are men and 30% are women. 61% are white, 30% are asian, 3% are hispanic and 2% are black.
Like I said, it does not surprise me. What Google said is that they are using their resources to bring education on computer science to the groups of people and genders that are under represented at Google and places like Google.
From my experience, the interviews we do here, are almost all white and male. It is just what mostly comes out to interview with us. But we are strictly a programming shop and design shop.
So in short, white men are making up the algorithms for the search results - thus the search results may be some white slanted to white male interests. (I am half joking)