It seems that the single-mindedness of the male "hunters" mind suits working with computers quite well. You focus on annoying trivia to the exclusion of all else for a while and that is exactly what is needed. Females seem to be more balanced, and capable of many concurrent tasks, which makes them slightly less likely to allow themselves to be as obsessed as males are with computers.

Of course all this is generalisation and doesn't apply to great chunks of people..

One other thing that seems to happen in the programming language world is testosterone charges debates/arguments. Thats not terribly attractive to 60% of the population, so that can't be helping either.