I don't know if it makes a difference because I live in rural Alabama and but I meet very few people, children included that do not use yes mame, no mame when speaking to you or please and thankyou. Adults even address people this way if they suspect you are even a day older than them. Everyone is very friendly and polite. They don't dare let their momma hear otherwise. Even friends will use a miss or mr in front of a person's first name, like Miss Julie, or Mr. Wayne.