Chicago native here, been living in Dutchess County (about 80 miles north of NYC) for many years now. (Hi, toadspittle!)
Most (white) people here have a noticeable “northeastern” accent, to my ears anyway, including several pronunciations and phrasings that I rarely if ever heard growing up. “Hairy” and “Harry” are differentiated here, for instance, and people “stand on line” rather than “in line,” and “quarter of” seems more common than “quarter to,” and…a few other things like that which serve to remind me every day, in a not-real-obvious way, that I’m not from here.
If we’re talking the “NYC outer borough working class accent,” though, that’s much more obvious–and much less common in these parts. I do know a number of folks, but not all that many, who speak this way. Mostly they come from the Bronx or from Queens. [My favorite anecdote regarding the accent (understand that I work in a school)–a teacher with this accent told me that a kid in her class was “extremely autistic.” I knew the kid and I was opening my mouth to object–whatever else the kid was, autistic wasn’t it–when I realized what she was actually saying.] But–most of the people I know here who grew up in the Bronx or in Queens don’t speak this way; they just have the milder “northeastern” accent.
And what’s especially interesting to me, alluded to by Hari Seldon above, is that the children of the heavy-NYC-accent-speakers don’t have that accent at all. I know; I teach some of those kids! They sound like all the other kids who grow up here–that lighter northeastern accent and that’s about it. The accents they are a-changin’…