Folks not in USA or new to the USA, often complain that there is nothing but monotony across America. Every town has atleast one McDonalds, a 7 Eleven and a church. But you are either totally naive or too politically correct to point out to not notice subtle differences in people’s accents. Not only phonetically but certain terms mean certain things in certain parts of the country.
I noticed this first hand..Soft Drink is a soda in the east n the west coast, Pop in the midwest,Coke in the south (http://www.popvssoda.com/). But here is a map of different regions of the country with certain distinguishable accents.