She says American are very friendly, and always hold doors open for her.
As a balding middle aged man, I can't remember Americans being overly friendly, or holding the door open for me ;)
Small town USA is very different from the large metro areas as well. I've travelled through a few small places in my time there and always been struck by the observance of common courtesy and a level of formal politeness which I appreciate. "Yeah, cool" is not always an appropriate response...!