I grew up in Pittsburgh, graduated from PSU in 1980 and have lived in LA, SF, Stamford CT, Chicago, Dallas, Houston and have traveled extensively all over the country. There’s no doubt the East Coast has the worst attitudes with a genuine ‘FU’ approach to anybody & everybody they don’t know in public. By East Coast, I’m referring to anything from DC, Philly, NYC up to Boston. Pittsburgh is more Midwestern than East coast and it’s not even debatable. Just compare Philly to the Burgh and that’s all that’s needed. Yes Ohio State fans are uppity, but that’s like any big time football program fan base. We have our own projected attitudes as Penn State grads/fans.
But visiting, or living in Chicago, Indy, Cincinnati, St Louis, etc., you’ll find far more friendly, open, accommodating people in public than anywhere on the East coat, or better stated: the Northeast. Pittsburgh is the same way, unless you are a PSU grad/fan in direct contact with a Pitt grad/fan. Then it can get ugly, fast.