This is the typical behavior I tend to see. In general, most Africans that are serious about dating/marriage, only date within their tribe, other people from Africa, or whites. African Americans get stereotyped very badly, especially the men. It's much easier for African men to bring home AA wives than it is for the opposite because a majority of the tribes are matrilineal. The ones that are causal, well, you can get at them, if you have what they're looking for because they don't have strict cultural requirements(but that doesn't mean their parents don't).
To answer the question..... AA women can get African men easily if a particular African man wants them. The women are harder to attract. This is why I, personally, don't gravitate towards African women... them and their families' hang-ups towards AA men.