You probably have a more unified culture than the UK!
North v South
England v Scotland v Ireland v Wales
Chavs/Charvers/Townies v Normal Peoples.
Then there's the whole tribalism based around Football/Soccer teams.
We still kind of have North vs South, and East vs West, and everyone vs Florida. Actually, I'd say most of the country is kind of against the South.
As someone who has relatives in both Sweden and Norway, and has been there often, he's fucking lying. Americans work hard. Very hard.
It's generational and regional for sure. People around my age (mid 20s) are lazy as fuuuuuck, but Mid Western farm people (and real Mid West, like Iowa/Idaho/Missouri/Oklahoma, not Indiana/Illinois/Ohio) work about as hard as anyone.