I've been in programming for a little while and I would politely like to suggest that only 25% women in a field is actually pretty major.

I work in a reasonably balanced environment, but going to a conference with 90% guys where the vendor thought it was appropriate to employ waitresses in bikinis at their function(while at the same time time offering free alcohol...sooo not a good result), where every second speaker seemedto use anecdotes about their technologically illiterate wives really gave me pause.