What a load of nonsense. And they wonder why feminists frequently charge that our education system is riddled with male privilege...
It seems fairly obvious from the selection of words they describe as male v. female seem on the male side to heavily weighted toward words which indicate specifics and concretes (a, the, at, said, is, these, to), whereas the female side is weighed toward conditionals, feminine personals, and relationals (she, her, hers, with, should, if, and, we). I find it funny that they consider "me", "myself", "when", and "where" to be feminine, while considering "as", "what", "more", and "it" to be masculine.
In fact, the single largest hit on almost all of my writings seems to be the word "the". I simply don't see how this could have any basis in scientific fact, when the majority of the most basic words used in the English language all fall under the masculine side. I have a hypothesis that these two researchers (both men, by the way) have a large misogynistic bias in their assumptions.
Oddly enough, the only sample of my writing that turned up female in their test is a section of a work of fiction I'm writing that incidentally consists largely of a dialog between two men.