Is this an American comedian?
Because if he did a tour from Iceland to Greece he would be very surprised.
In general the differences here are very minor compared to Europe.
But differences exist too. For example Massachusetts alone, the state I live in, has 3 interesting demographics as you travel from East into West.
East is more liberal, mid-west is Republican and West is a mix of party-town colleges, and very unique interests. These people are more independent but they swing more on the red than blue.
I'm at the border line between Republican and Blue Liberals.
But if we were in Europe, i wouldn't even understand your accent and cultural customs and language due to huge differences which come from history of the old countries.
The differences in towns in U.S. exist too, in terms of, this here is the unsafe zone, the poor zone or the rich zone, but all of them speak English despite certain language nuances. lol
So when i mean you can't understand somebody in Europe, i mean like that movie Snatch where Brad Pitt plays a "Pikey" and you can't understand a word he says in English.