Depends where you go in the US Jeri....I would guess
all towns have parts you'd be advised to stay out of.
There's parts here I won't work in.
I'm just referring to crossing the border. It used to be friendly, what's going on, what're you going to buy, have a nice day. Now it's a thousand questions: who do I know, what's my job, how long have I had it, how long will I be in the USA etc. If they sold fat girl clothes in Canada at a decent price, I probably wouldn't visit the USA at all, the hassle is annoying.
I find Americans to be just as friendly as Canadians, or anyone else really. Anyone who is out to portray one nationality as more 'friendly' than others is really being a jerk who hasn't bothered to get to know people.