well, depends. Water is consistent more or less on its flavor everywhere. Now chocolate milk can vary widely depending on the mixture
I know some Mexicans that work at a chain tex-mex (always packed) and they only eat at the Mexican restaurant in town!
Well of course a local mexican restaurant will serve "actual authentic" food compared to a chain
I always go Chipotle, just for how good it is. Plus doesn't send me to the bathroom in an hour