For men, the results were as expected. Hunks were more likely to be called for an interview if they included a photo. Ugly men were better off not including one. However, for women this was reversed. Attractive females were less likely to be offered an interview if they included a mugshot.
Without knowing much about the person who wrote the article (as it's an anonymous guest post), I know a lot of women, myself included at points in the past, can be very harsh and judgemental towards other women. There's an attitude among a lot of women, especially in youth, that other women are too emotional, gossips, obsessed with looks, and so on. Many grow out of this, and some don't. If there is any real psychological difference between women and men, I think this sort of unnecessary competition, jealousy, or general discomfort towards other people of our same gender is where it lies. I'm sure there's some interesting studies on this kind of thing out there somewhere.