Having read the article, I think it would be good for you to quote something out of it that is blatantly sexist. So that your comment doesn't equal a mixed insult to the writer based on a general feeling you had at times.
Imagine if it said "how to teach your black friend to program". Why only black friends? Why only girlfriends?
Audience = programmers. Programmers = at least 90% male. I don't know what proportion have girlfriends, but we can always hope the number is pretty good.
(http://www.theatlantic.com/politics/archive/2012/05/american...)