[baby]

My own explanation is that to be good at computer science you need to have had spent a lot of time in front of a computer during your childhood. The LGBT community used to be much less (and still is in most places) accepted IRL, and as such you'd have to find your community online.

So here you have it, that's my theory, a lot of LGBTs spent a lot of time online and then got hooked on computer science stuff.