So are you saying that happy, or relatively non-depressed people are the minority in the world? Or is PT a microism of a world consisting of a high percentage of teenagers.
I consider myself a happy and well-adjusted woman who knows mostly happy and well-adjusted people. (and for the record I would've never called myself sad or depressed as a teen either.) I never would've considered myself a member of a contented minority.

And, as a note: I DO NOT consider it depression if you're sad because XYZ left you. That's life, get over it and move on.

Again, ya learn something new every day.