"African immigrants in the United States have a higher level of education than all other groups, including white and Asian Americans, staying in school an average of 14.5 years. They have a median household income that is higher than that of black Americans, West Indians and Hispanics."
That's from a piece on their support for Obama in today's Post.
[Update: I suppose there are a number of possible explanations for this: Opportunities in the African countries sending emigrants could be particularly limited for the most educated. The cost of emigrating might be such as to screen out the less educated. Relatively speaking, the US is more attractive to the most highly educated Africans than are other countries which attract immigrants--i.e., Canada for example might attract more than its share of Asians and less than its share of Africans.
We don't know whether they come here into more highly paid slots or, once here, rise more quickly so it's not clear what the data might say about the opportunities to prosper here.
We don't have a feel for the proportions of Africans migrating, do more or less migrate compared to Southeast Asians, for example.
Bottom line: facts are tricky.]