Link: http://bookblog.net/gender/genie.html

It's called Gender Genie and contains an algorithm designed to determine if a block of text was written by a woman or a man. As a quick experiment, I fed one of my blog postings to Gender Genie and this is what it reported:

Words: 356
(NOTE: The genie works best on texts of more than 500 words.)

Female Score: 384
Male Score: 466

The Gender Genie thinks the author of this passage is: male!

So...a score of 1 for 1. 100%! Clearly an utterly infallible tool...