http://www.cs.cmu.edu/afs/cs/project/gendergap/www/papers/IEEE99.html
I used to consider myself sort of feminine, but I'm noticing more and more now how male and female thought structure differs. It's hard to explain, but "I know it when I see it". Wired Magazine, Digg, 4chan, theoretical science, etc., lend themselves more to a male audience, even INFJ males. I just wish I could articulate better what I mean.
I would think that it would not be a male or female thing, but would actually be a Thinker and Feeler thing.
A good friend of mine who I have known for 17 years (since we were 4) is a female majoring in Computer Systems Engineering. She loves the technical part of it, and doesn't give a SH*T about the people part of it. She hates people, really. She is an INTJ and she has a REALLY high T. She refused to do charity work with me even when I told her that it would look good on college applications, because it was a "waste of her time".
I think the fact that 65% of men are Thinkers, and 35% are Feelers, and 65% of women are Feelers, and 35% of women are Thinkers can account for why people think their research supports gender stereotypes: 2/3 of people do support that stereotype, and people find what they want to find...but that is still over 2 billion people in the world that are being stereotyped incorrectly.
Another reason genders seem to be able to be so stereotyped is because of socialization. Which I don't have the time to get into now (really must go to bed...gah), but feel free to research yourself. I'll just say that: men are taught to be more independent, and women are taught to be more communal, and so many people end up falling into those roles that they were taught.
So, even though more males may fit a certain stereotype, it doesn't mean it is because they ARE male, and same goes for women. There are other factors that need to be taken into account. That's just good science.
What was it about yourself that you thought was "feminine"?