Seriously as I get older the "younger" generation seems to be getting shallower. I learned to weld when I was very young, by the time I was 14 I knew more about cars than most adults, and I could do some elaborate BASIC programming on my old Commodore. Now you try to engage someone in conversation beyond TV or Video Games you are "so totally gay."
I agree with you Pleocostomos

I've never really thought of it as shallowness, but have tended to place to blame with those who provide the mental stimulation for the younger generations. The topic I normally raise at this point is youth-oriented television. It's nothing like it was when I was little. It used to be innocent and light hearted, and many programmes would have lovely stories. Nowadays it's just a mindless montage of flashes and lasers and explosions and stuff rising up out of the ground... And there's lazytown.
To me, it has a similar 'feel' to the attitudes you're hearing from youngsters. This is the sort of thing they've been raised on. It's what they know as entertainment. It doesn't have story or depth. It's mindless yet captivating. It's just a blast of sensory stimulation, not general mental stimulation. Modern FPS and MMORPGs computer games are of the same ilk: Mindless yet captivating, rote inducing games.
In short, modern entertainment doesn't inspire. It doesn't point to the world outside of itself.