I agree that in Europe people speak more than two languages, for example I have German friends who speak Polish, Russian, Germand, and English. However, my perception of the different in communication is that in Europe people tend to get together more often for truly relaxing activities, just to have fun, to enjoy a common sport, activity, or just get to the pub have a cup of coffee, a beer, and talk about the weather, the family, their mutual news. In essence, they seem to have more time to cultivate a frienship without involving a business matter in their leisure time. I still have friends who write actual letters on paper, even in this Internet craze, their letters bring a very personal touch and a sense that I am important enough for them to take the time to buy nice stationary, write a note by hand and tell with nice and expressive writings that they do think about me. I really enjoy this type of communication. On the other hand, my friendships in the US seem to be reduced to emails, and not event that anymore, Facebook, Twitter, MySpace, and other similar applications have taken over emails for the most part. My thoughts and my friends thoughts evaporate to the cloud as soon as they are typed onto an Internet application.
I am sure that there are more factors that those who meet the eye at frist glance, but definitely a very personal touch is one of the differences I can see between people in the US and people in Europe, but again, this is only my personal experience.