big favour to ask to all of the American people here!
I'd be glad to do it under 2 conditions.
1) You'll spell favor correctly - just keeding here, I know Poles are in love with the Anglo-French way of spelling English. LOL
2) You'll share your findings with us.
It's interesting you're doing research on this subject. Since I travel a lot I often mention this to my parents how differently people seem to be interacting with each other in other countries. Even in the US there are stark differences between let's say Northeast and the Southern states.
When I moved to the States many moons ago I remember calling my mom one day proclaiming - Mom, I love this country! All the ladies are smiling when I look at them... LOL