This was on my mind earlier, but, finding myself unable to put it into words, I didn't comment.
My first thought when I read the article was "lol 'built a wordpress.org,' nice." Then I realized I was being an idiot and that it's great that they're learning. But something didn't jive---excluding my little sister, at no point can I remember teaching a female anything technical without getting either impatient or patronizing.
But, as I think about it, both are signs that I wasn't really there to teach. I was either trying to impress them, or uphold my self-image of being smart, or something else that wasn't teaching.
As a single guy of no particular attractiveness studying a technical subject, I consider myself a member of what one could call the aspirational class of the social world. I don't feel satisfied with where I am in life. Considering the low value we place on teaching in our society, I'm pretty sure teaching would not be a good way to remedy this.
I wouldn't be surprised if many male teachers of technical subjects aren't really happy to be teaching at all. Wallowing in their discontent or outside ambitions, perhaps they're unable to fully engage in the empathy required for good teaching. Questions "obvious" from the instructor's point of view will be brushed off or scorned, reflections of his self-hate. A male student hearing this will think, "Fuck him, I'll learn this anyway." A female student will think, "Why on earth am I hanging out in this environment?"