Is it because teenagers are not really interested in new social networks, they just want to be where their friends are?
That's not just teenagers-- that's pretty much everybody, if you ask me.
Now, I don't know where you are in Europe, but here in Norway, Facebook is pretty much ubiquitous with teenagers. I was a hard-ass with my daughter, and wouldn't let her sign up until she actually turned 13, so she was sitting up on the night before her birthday, with the form filled out, waiting for the clock to strike midnight so she could submit the form. Within 18 hours, she had more "friends" than I do, and all of them were kids she knew from school.
Note that also, here in Norway, there was another social network aimed specifically at children, which was quite popular-- perhaps it still is, with the under-13 crowd who don't have access to Facebook.
That's not just teenagers-- that's pretty much everybody, if you ask me.
Now, I don't know where you are in Europe, but here in Norway, Facebook is pretty much ubiquitous with teenagers. I was a hard-ass with my daughter, and wouldn't let her sign up until she actually turned 13, so she was sitting up on the night before her birthday, with the form filled out, waiting for the clock to strike midnight so she could submit the form. Within 18 hours, she had more "friends" than I do, and all of them were kids she knew from school.
Note that also, here in Norway, there was another social network aimed specifically at children, which was quite popular-- perhaps it still is, with the under-13 crowd who don't have access to Facebook.