The burden of proof is on the side arguing there's something "special" about Google. The effect is present everywhere we've looked. Lacking any specific evidence to the contrary, it's present in Google hiring too.
I don't usually like to ask for citations, but he said the data was easily found which is clearly false in this case. And there are good reasons to believe google, a company which hires a "VP of Diversity" might be different from the companies previously studied in entirely different industries with entirely different hiring practices and requirements. I know in academia, female applicants are favored in the hard sciences: http://news.cornell.edu/stories/2015/10/new-study-explores-g...