Thanks for pointing this out. But yeah, sf award ballots in general tend to lean disproportionately toward male authors.
And as they note, "the Tor.com audience is too small in comparison to be reflective of book-buying audiences as a whole." It took only 20 votes to make the bottom of that list, and only 88 votes to make the top 10. (That's roughly comparable with the number of votes it takes to make the Hugo ballot in a given year.)
See also Broad Universe's stats page—it's a little out of date, but it has some interesting stuff.
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And as they note, "the Tor.com audience is too small in comparison to be reflective of book-buying audiences as a whole." It took only 20 votes to make the bottom of that list, and only 88 votes to make the top 10. (That's roughly comparable with the number of votes it takes to make the Hugo ballot in a given year.)
See also Broad Universe's stats page—it's a little out of date, but it has some interesting stuff.