Yes, the basis for the hypothesis is fried chicken -> black people and craft coffee -> white hipsters. But that's actually what happens with gentrification. Diverse neighbourhoods get plowed over with rich white people.
Using race in an analysis doesn't make it racist. OP saying they wouldn't want to live in the places with fried chicken, in the context above (KFC->black people) would be.
I'd say the piece itself rides the line. It has a sarcastic tone throughout the piece, more of a "let's find out where the gentrification is" than "let's go live there".