I would hope not, but suspect it is true.
In recent elections 90% of black voters voted for Demoncrats, in 2008 99% of black voters voted for Obama, I doubt very many would vote for Alan Keyes or Herman Cain.
P.S. that is not a misspelling above.
Blacks have been so propagandized that Republicans are all Klansmen and slave masters that they have a psychological block that prevents them from ever voting for the GOP. (Not to mention that it is no fun to be called "Uncle Tom," "Oreo", etc.)
So for the most part blacks support Obama because he is a Democrat. The fact that he is black does, however, increase voter turnout and enthusiasm for him.