These numbers are based on the people who have been reported by others on the website Cheatersville.com to be cheaters. This is no "study". It's even less reliable than an online survey that simply asks if you have cheated. These numbers in this so-called study do not take into account the person reporting someone as a cheater. I think gay men in their bitterness after cheating run to the computer and report the cheater more than a lesbian would in the same situation. I also suspect that in the case of heterosexual women, it is women reporting 'the other woman' and at the same time not reporting their husband or boyfriend that was just as much involved in the cheating. It also does not take into account that some may be using this report-a-cheater site as a revenge thing on former friends, acquaintances, coworkers, neighbors, etc. in disputes that have nothing to do with cheating.
And the author of this article is no journalist. The misleading headline does not even agree with the misinformation he reports in the article.