It's TV, not real life. Rachel does get to some interesting places but I'm very aware that, even if a show host is completely honest, tastes do differ. Don't watch Bourdain, usually, as I don't enjoy him so much. He overdoes sarcastic, almost as much as Rachel overdoes perky.
Have you watched the Diners, Drive-ins, and Dives show? I'm familiar with some of the places they featured, and my opinion agrees with Guy Fieri's bits on El Indio (Where Random has eaten!) and the Ramona cafe, and the little Studio diner, and that greek dive in the desert, and one of the places outside of Phoenix. I'll be keeping Guy's roadfood book in the car, in the basket with the freeway atlas and the Googlemap printed pages and the other roadtrip detritus that accumulates in the back seat.