Been that way for years here; Eastern Massachusetts/Providence area. Remember seeing the transition in the 80's, at least in my area. Parents generation almost all owned domestic, suddenly the next generation were buying Civics and Accords as soon as they graduated college, GTI/GLI's if you were a car person and a BMW e30 if you were a car person and majored in something lucrative
The 80's were also the nadir of the domestic offerings....