It's worth noting that "non-New Yorkers" are few and far between in NY. Regardless of accent, skin color, socio-economic status, or where you lived last year, you're a New Yorker if you've taken the subway without looking at the map or yelled at that cabby that inched just too much into the crosswalk. I was born in Manhattan, I grew up in Westchester, I've lived in Manhattan as an adult, and I currently live in Brooklyn. I have many friends without US citizenship that I refer to as New Yorkers. The only people I truly consider non-NYers, are people who don't actually want to be here or take advantage of what it has to offer. I have a co-worker from North Dakota who, after 3 years living here, still hasn't stepped foot outside Manhattan. Those are the non-New Yorkers.

It's also worth contrasting that with my sister who has lived in Raleigh for almost 10 years now. They still call her a "Yankee".