I read the article, and it seemed that Dr. Soh was describing a gene which correlates to higher levels of separation anxiety which have been found among homosexuals in three different disparate populations -- not claiming that said correlation is a genetic cause of homosexuality.
A fine distinction, perhaps, but as they say, correlation does not equal causation. I would be very surprised if any article would come out claiming homosexuality to be genetic in that way, as that would make it diagnosable (rather than just predictable) via genetic testing, which would validate the "born this way" idea, but at the cost of essentially making it curable, which in effect is admitting that it is a kind of disease, and then all the gay pride stuff would be akin to having a "Lupus Pride Month" or "Irritable Bowl Syndrome Pride Parade" or something...those would be understandably much less popular and much less filled with social capital than the current gay pride stuff.