the data from a dating website ain't revealing the whole truth imho, or it depends on the purposes of these es, just like you said es come to such dating websites looking for someone to "date", not to settle down with. And most cases they just look for "dates", or just online "dating" sometimes, which rarely lead to a hotel room or anything where they can , otherwise those "dating" website would've been "pimping" websites imho.
Therefore, while white men are the fair-haired boys on such "dating" websites, es of all races would still rather choose a black 10-incher over a white 5-inch one to go to bed with, imho.