Of course it is!
Don't you watch "Law an Order" Or pretty much any TV or even read publications?lol.. but anyway, North of NYC is Up State and Long island is Southern NY.. Pretty-much the rest of the Country refers to Orange, Rockland and Westchester county's and parts north as UP-State. Examples of the reference being as so, can be found In Books, Movies, on TV, Historically.
This interesting fact that I learned late in life, also being reiterated here, is that most of the Residence in the central area of NY in do not consider anything below them Upstate. I Don't know if an egocentric thing, lack of being educated of the fact or what, but that's how it is .. However, I know most of us all feel that those Western New Yorkers Might as well be in another state (eg Buffalo).. .lol
Anthropology is interesting..