There are guys who might harass you here if you make a big deal of being a woman. Unless you're bitchy like me then they leave you alone.

Seriously, though, it's just like most other geeky things - male predominated - and the women on here are often not obvious. And yes, a lot of us have high post counts because we've been here a relatively long time. Posts per day may be a better indication of how active various people are.
And just like any other forum the women come and go based on a combination of their interest in the boards and the balance that strikes with the rest of their lives.
Oh, and I'm happily married now, too.