I'm too lazy to read the article so I'll wildly speculate in grand Slashdot tradition. Did the authors investigate why that's happening? I could imagine at least a few non-nefarious causes:
Maybe men are more likely to vote against a show they dislike than women are, so as many women dislike "Blue Mountain State" as men dislike "Private Practice" but they don't bother downvoting it.
Maybe men are more likely to watch shows they dislike with their partners than women are (and this is certainly true in my house). I'll sit through shows I don't care for because I'm not all that picky and I'd rather spend time with her watching Grey's Anatomy than doing other stuff. The converse isn't true: she isn't likely to sit through COPS with me. I'm more likely to have an opinion and vote on her shows than she is mine because I've seen more of hers.
As a variant of the last one, maybe women generally feel that they have less spare time around the house to watch TV. In households where routine chores are "women's work", the male resident might put in more screen hours than the female who has laundry and cooking and only has time to watch the shows she really cares about. (Note: I am not saying laundry and cooking are women's responsibility, just that lots of households divide work that way, and I think probably enough to sway the numbers.)
Yes, I'm sure there are dumbasses who routinely vote down female-centric shows (as defined by the study) just to be jerks. I'd stake money that there are plenty of women who would go down the list of male-centric shows and vote them down, too: "Batman? Dumb. The Shield? Dumb. Star Trek? Dumb." But are there enough to make a difference, or is it more likely the effect of different TV viewing and/or Internet poll taking habits between the sexes?