I can agree with a lot of this. I mean, don't get me wrong. I'm 21, and I loooooooooooove my phone. I'd be lost without it (literally, as it is my GPS and I live in an unfamiliar town and have no sense of direction). I did get addicted to Facebook for a while there, and have cut back a lot. The thing is, I don't just randomly text people asinine "what's up" questions. I hate those and refuse to reply to them. However, I am approximately 3600 miles away from my family, and texting is a big way we keep in touch. I text pretty much from the time I get up in the morning (to say goodnight to my long distance night shift fella), to the time I go to sleep (to say good morning to that same fella). Yeah, I would rather call and talk for an hour, but people are busy and that's hard to do. A text conversation is much easier to carry on throughout the day (yes at work and at school, too!).
All that said, I do put my phone away when I'm with friends. I like to live in the moment -- when I'm actually spending time with someone, I'd like to spend time with them and not my phone.