Now that I am done being a sarcastic bastard; many people have social anxiety, are terrible at reading subtle social cues including body language and are less hesitant and more eloquent communicators using text rather than face to face or over the phone. These people are disproportionately male.

This doesn't appear to be true for the clinical definition of social anxiety. What you're describing sounds more like a mix of social anxiety and autistic traits than pure social anxiety disorder, but although there is a substantial gender gap in autism diagnosis, it doesn't look wide enough to account for the observed ratios.

Autism rates combined with the observed gender gap in the rest of STEM come close, but for this to be the whole story we'd need almost no non-ASD folks to go into IT, and that doesn't seem to be the case.