I've seen a couple of sites that I read, including a small victory (who won't link to me) and Julie with a B (who links to the old site, she's linked here that long) that have referenced a thing called The Gender Genie. Both these ladies were surprised that the Genie thought they were male. Or wrote like males.
Interesting, I thought, and tried it myself. Actually, I tried it a couple of times. Male. Sure enough. Maybe it thought everybody was male. That way it's right at least half the time. But then I decided to search the archives and find an older post. So I got one of my favorite posts: 61*
Lo and behold, it said I write like a girl! I wanted to slap them. I mean, punch them. But that would be wrong. And I'm never wrong.