Having grown-up in a small town in NE I would say no to your answer. Growing up you knew everyone in the town. Things have changed in the past 30 years. Towns have become cities, neighbors don't know neighbors.
The Eastern coastal area is one of the fastest growing area's in the US. I work in a very busy business in the town that I was raised in. Almost every face is a new face. Most peoples lives here in the NE are very fast paced. With this fast pace people don't seem to have the time to be friendly. Slow them down a little, and under that fast pace, unfriendly person, there is a friendly person, but it doesn't last long, soon there walking out the door.
Over all I would have to agree with you, no time to waste, like the White Rabbit in Alice in Wonderland, their always in a hurry and have no time to waste, with this come no time to stop, or talk, or wave. Time-a-wasting no time to be friendly now.