I say this with the warning that I have not had KFC in years.
In the town that I just moved back to (I lived here when I first moved to Georgia eight years ago), the KFC makes me violently ill. I'm not sure what it is. If ever feeling constipated, stop at this KFC.
When I moved to a different town (prior to moving directly into downtown Savannah), I would eat at KFC a couple of times during the month. I would not become violently ill. Now, Savannah - it didn't make me ill, but the quality was poor. KFC has made my boycott list (along with Sonic, Gata's, Applebee's, Taco Bell, Shoney's...)