Just reading this table of contents reminds me that this "analysis of teens" seems a lot like the perennial contemplations of adults who think that the generations of teenagers coming behind them is different, weird, or even deviant.
A typical case in point is that of the greatest generation looking at the long-haired 60's hippy teens who came after them. "Why do they like rock and roll? They do too many drugs. There's no hope for the future." "Damn kids. Get off of my lawn!"
Is the way that current teens and millennials react to social just another incarnation of this general idea?