The article had me until it basically said using "he" in documentation makes you an asshole. It does not. Period. You can say it's better to use they, and I would even agree with it. But the article did not stop there.
http://en.wiktionary.org/wiki/he
There is a prescriptivist movement that has branded the use of a generic "he" as not generic and therefore sexist. I refuse to feel guilty because someone else has decided that they can declare language to have officially changed, and dictate what I meant by words I used.