I worked as a pollwatcher in Kansas City, MO and I was amazed by the huge black turnout in this particular district. They would come... stand in line for two hours... pop in, grab a ballot (as first time voters) and then they would simply pencil in “Obama” (they had no desire in keeping that secret) and they would leave the rest of the ballot blank!
I noticed a LACK of Latino voters, but lots of neighbors.