Being only 18 I can safely say that we spend a lot of time on our phones at school purely out of boredom and to keep us out of trouble (when they banned phones a while back more windows were broken, chairs thrown and other messing around occurred). Though this may only be the case with my group of friends, but we all have an unwritten blanket ban on phones at parties (unless you're taking pictures) and when we go out to the pub or whatever.
I guess we just look up to the generations above us to communicate to others. I've asked my friends and about half say they don't mind texting, but the other half (myself included) hate texting and would much rather see the person face to face to talk, so what's the point of having your phone out at the table when you could do that in your own time? Makes my blood boil when I see couples both on their phone in restaurants not talking to eachother whilst waiting for their meal.