That's a valid point. On the other hand, as a dating site, OKC messaging is probably going to be skewed towards the gender that one is interested in pursuing a relationship with (though maybe that's just the way I use it; as soon as I typed it I felt sure there were plenty of people just looking to hook up). When the topic is sexual orientation vs. romantic orientation, I'm not sure that OKC is the best source of data. I can't deny the specific claim that a large proportion of ostensibly bi people appear to not be both bisexual and biromantic.