Except the reasoning on the OkCupid blog is completely worthless because of this little note:

We were careful to preselect our data pool so that physical attractiveness (as measured by our site picture-rating utility) was roughly even across all the race/gender slices. For guys, we did likewise with height.

In other words, they fucking control for physical attractiveness. If men found e.g. Black women more physically attractive en masse, their charts wouldn't reflect that. What actual effect they were measuring, exactly, is a mystery to me at the moment.