As for no data, I did write my comment with no data to back it up. I would imagine less than 10% of comments I see on HN are made with solid information to backup someones thoughts. Most people on here are smart people that can make up their own minds and provide information from the world they see around them.
Did you have any data to back your comment up? Here's a start, OKCupid claim the median number of partners for both men and women, gays and straights is 6. I've just gone out and googled for such numbers, and whilst I didn't find anything definitive, I didn't find one median or average as low as 6, in fact looking at 18-35 as another commentator points out as OKCupid being representative of, 9 would appear more likely (my guess would have been 8). So that probably supports my assumption that there is a bias to some degree - OKCupid users appear to be getting less than the average. I have no idea where OKCupid falls in the spectrum of dating sites, I have no idea how many active users there are in the world of dating websites, but I would be staggered to see statistics that extrapolate to the user base of a singles website being indicative of overall society. In 10 years time, maybe, but at this point in time I doubt it. This article is trying to claim it has real facts, all I am saying is take those facts with a grain of salt.