I have noticed this some too. But on the East coast, I think it holds true as you go West. Northern New England seems pretty friendly, my Mom is from Maine originally, but NY, NJ , etc. has some of the rudest people around. I know I will probably get flamed for saying so, but that is my observations. My former business partner was from NJ, maybe he wasn't a representative example but I have seen other fine examples in RI for example.
So, if people are nicer as you go West and North, that would make us here in the great Pacific NW the friendliest people in the USA.
Well I mean this all in fun, I know there is great people everywhere. I would like to go to the SE someday and experience some of that famed Southern hospitality too.
Shelby
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2001. 5 2500 QC LB 4WD, ETH (Built 09-10-00), DEE, 3. 54 gears, Laramie SLT, Camper Special, Trailer Tow, Travel Convenience Group, Power Driver Seat, Alarm System, Remote Keyless Entry, Fog Lamps, Cab Clearance Lamps, HD Transfer Case, Bright White with a Gray Interior. Built 09-15-00, took delivery on 10-06-00, 3873 miles as of 01-04-01. Custom aluminum work body / flat bed. Coming soon: E-Brake and gauges.