Via clagnut, find out what gender you write as, or anyone else for that matter, through The Gender Genie. I threw a couple samples of my writing at and much to my relief, I write like a male.
According to the scientific writeup by Koppel and Argamon, the engine uses the assumption that males use more noun specifiers than females, and that females use more pronouns than males. I’ve only skimmed the artical so far but it seems like a very interesting read.