Pulled a few different ones out of curiosity. First a blog post:
Female Score: 1766
Male Score: 2151
The Gender Genie thinks the author of this passage is: male!
then a year old fanfiction scene:
Female Score: 3333
Male Score: 4617
The Gender Genie thinks the author of this passage is: male!
Then an RP entry:
Female Score: 1040
Male Score: 1153
The Gender Genie thinks the author of this passage is: male!
Then a c/p'd post from my intro post here:
Female Score: 1719
Male Score: 1581
The Gender Genie thinks the author of this passage is: female!
------------
Kinda funny the intro post here is the only one that shows as female, but it's also the only one where I was talking about myself, but I noticed something. The more self or person specific words (I, myself, me, your) get a higher female rating, the more subject neutral words the higher the male rating. This page seems to base off more commonly used words than actual writing style in and of itself, mostly in regards to specific subject verses none specific subject though there are other key words in either list but those seem make the bulk of it. Basically if you're talking about yourself or someone else using more subject specific words you're going to get a higher female rating, at opposed to if you're talking about locations and actions. At least that's what I noticed with the entries I tested it out with. Hope I worded that right, just woke up not long ago.