I've gotten reports of light turnout across the state today in GOP boxes in African-American areas, so I decided to verify that for myself. Here's what I found:
In 2011, there were 173 Democratic primary voters at the Jackson Medical Mall, 0 GOP primary voters. As of 3:44 pm today, there were 52 Dem voters, 2 GOP. Not exactly in line with Thad's hopes.
Down the road at Bishop Avenue Institutional AME, in 2011, there were 236 Democratic primary voters, and 0 GOP primary voters. At 3:59 pm today, there were 88 Dem primary voters, and 3 GOP voters.
It appears as though Thad's crossover efforts in the black community fell absolutely flat. One has to wonder about the wisdom of that late-game maneuver in the face of racially-radicalized Mississippi Republican primary voters.