I guess it's true that you can't arbitrarily pick a number of years and decide at that point you'll become a New Yorker, and I'm sure it varies from person to person how quickly they adjust to life here. I guess I have to agree with the author of the Examiner article that there are just moments that you realize you've become a New Yorker. This is my favorite from the article...
Even after my mere 11 months (and 1 day!) here, I do feel like I have these moments where I really feel like a New Yorker rather than a tourist, like when I'm visiting my family in Sarasota and I can't sleep because it's too quiet, and when I come back into the city after that weekend in Florida and am comforted by bright lights and honking taxis. And I definitely feel like a New Yorker when I'm shocked that my friends in other cities pay "only" $800 for rent, or a Cosmo is "only" $8. I know you can't become a New Yorker in less than a year, but I do feel like I've adjusted to life here much better than I would have expected...
I'm curious about other people's "I know I'm a New Yorker" moments though, any to share?