New Yorkers seem rude to outsiders. They don't take a lot of time with polite BS small talk, they get to the point. See example of efficiency below.
Iowa (or most other places): Can you please tell me how to get to Main Street? I'm going to a store my Aunt Jane recommended to buy a new coat.
Oh, sure, go up there two more blocks and turn left at the light. Be careful, it can be busy and a lot of traffic. I hope you find a lovely new coat. I went to that store and they have a nice selection.
New York: (leaning out window) Yo!, Main Street? (other person pointing) Light, left