He is dead wrong. The blacks moving to the suburbs are educated families who want good schools and away from the filth and gangs of the city. My neighborhood is very diverse and most of the obama yard signs I saw two years ago were guilty white idiots.
I live in a small conservative California town an hour north of Sacramento. I know plenty of middle class black engineers in the San Francisco bay area, in Sacramento, and here in Marysville. Not a SINGLE black engineer I know votes Republican. Not a single one. Even the ones that don't themselves embrace liberalism, still vote party line RAT and dislike Republicans.
That is tiny anecdotal evidence, but in my experience, the people you describe are still useless to us politically, because despite their education and economic status, they all still vote RAT. Maybe in Texas it is different, but one of the brightest, best, hardest working coworkers I ever had was a wonderful ex-Texan black engineer who was a RAT through and trough and had nothing but scorn for Republicans.