Many are illiterate, unfortunately. But I do think there is a mindset permeating the black community/culture that it's cool to talk unintelligently. On a regular basis, I'll overhear two or three young A-Americans conversing, and am amazed at how little I can make of their converations, given the way they speak, which is mainly talking fast and dropping letters at the end of syllables/words. I guess it comes from a mindset of feeling like they need to be different, to have their own identity, even to have their own language or dialect.
It's a mess, that's for sure! How some of these young people get and hold down jobs, is beyond me. And not just blacks, but a lot of young whites, as well.