As a resident of Savannah, I can tell you that I find it hilarious to see people come from miles to eat her crappy food. I find her food to be on par with KFC, and I am not alone. Most other people who live in Savannah would agree.
I have been to her restaraunt once (As a local I don't have to wait in line for 4 hours to get in) I did not pay, so I consider myself unbiased as to the money / taste ratio. I have never been back, it would be very easy to go back, but I have no desire to eat the sold butter shaped in the form of "souther fried food"
She is on the food network because she has a great personality, not because her food tastes good. That is perfectally acceptable, you can't taste the food through the TV, you don't have to know how awful it is, only that it looks good and the host is good.