I think it has more to do with the parents of the kids who are working there, and how they were raised. There are isolated spots on the PA turnpike where you see fresh, young helpful courteous folks working there.
Probably the nearer you are to a metro area, the more apathetic and surly the kids get.
SD
The only problem with that place in Quebec was that the restroom was hard to find. I tried to ask the French girls where it was, but they couldn't understand what I was trying to say.
Finally I just grabbed my crotch and put a pained look on my face -- they giggled and pointed me in the right direction. LOL!
That rule is generally true. (Although I think MTV has contributed to pockets of apathetic surly kids in certain rural areas as well.)