As I responded in the above post to SuperDave, I used his post #276 in this thread.
Furthermore, this "Gender Genie" (such a cutesy name, ha ha) wants the user to check whether the submission is a) Fiction, b) Non-Fiction or c) a blog entry.
I tested the post, as well as something written by my male friend, with the fiction checked.......results were FEMALE.
I then tested the post with the non-fiction checked.....results were FEMALE.
Finally, I tested the post with the blog entry checked.....and once again, the results were FEMALE.
For the "proof" you are asking for, try it yourself! Again, that was post #276.
I think the Gender Genie's reliability can be put to rest. Without a doubt. It's a fun little novelty game, though.
OR....I do suppose SD could be harboring a secret that we don't know! After all, the internet provides MUCH anonymity.