It's actually my understanding that Morehouse(probably one of the most prominent black only universities) has been having trouble in recent years getting enough students because so many blacks are going to other universities.
I was reading an article about black universities the other day and I was suprised to see that almost every black university in the country is in the south. From the list I only saw 2-3 universities in northern states while 45 or so were in the south.
I can think of two in the Greater Philadelphia Area, Cheney and Lincoln; I suspect your article is wrong.
Well coming from a black magazine I'd hope it's not. It listed all the major black colleges in the US.
Here is the Wikipedia article:
http://en.wikipedia.org/wiki/List_of_historically_black_colleges_of_the_United_StatesThere are two in OH, one in MI, one in OK, one even in the Virgin Islands. There are more than I listed, but depending on how you define "the South" there are 10-30 outside of it.