I still think the article fall apart if you acknowledge that submissive male exist.
I don't see your data, the abstract say nothing about submission proportion in male and female.. but the :
2.2% of men, 1.3% of women said they had been involved in BDSM
make it feel that female are under-reporting (almost half as much) about the subject than male.
At least the article is right about something: people lie about their sexuality.