I don't think that girls are high in number in DP. Girls like facebook etc social media. If few girls are there on DP then those are extraordinary
I totally agree with you. Girls always remains busy with facebook and all. DP is for intelligent guys
It definitely seems like there are more guys on here than girls! I haven't been on these forums very long, but I haven't encountered many other girls yet..
There is no source to calculate the DP member that how many male or female. But there is a chance to measure the audience of DP with Alexa. Go and have a look in alexa.
When signing up at the forum, I think it would ask if you're a male or female. Maybe the admin or mod might have a better idea of how many of each gender there are