Good god, the comments on this article. You'd think the author went deliberately out of her way to not photograph women, and that she did so as a personal affront to the commenters.
It could also be that the author was just less intimidated by approaching men than women.
I would feel awkward walking up to strange women and asking them if I could photograph them for an article I was writing.
Maybe the article should be titled "Men's fashion in Silicon Valley", which would be more accurate.