I think that anyone who wants to use OkCupid's data as an example of the dating market as a whole, needs to show that OKCupid is representative of the dating market as a whole, not the other way around.
My statement was broader than intended. Obviously OKCupid's data is not necessarily reflective of all dating sites or interracial dating patterns overall, but Ta-Nehisi Coates is only presenting a hypothesis and some speculative claims, not data, and his speculation shouldn't be treated as anything more until someone presents data that supports it.