I had a Russian professor (teaching the language, and from the country) in college who mentioned one day in class (I forget how we got onto the subject) that Am

I had a Russian professor (teaching the language, and from the country) in college who mentioned one day in class (I forget how we got onto the subject) that Americans smile a lot more than Russian people, and that it generally seemed false and insincere to her. I've had other Russians confirm this, though they generally tend to be older.