[tiredofcareer]

Young people are not the mainstream media's target audience, but they are Hadfield's. The obvious undercurrent to his efforts is to get more kids interested in science, engineering, and potentially space travel; mainstream media doesn't get ratings out of that, so it isn't really worth covering for them. This Bowie cover seems to be gaining some steam, though; as another poster mentioned, I've heard about it from several people not in my usual "tech" circle.

Listening to the kids react in wonderment as he demonstrated wringing a towel out in orbit really drove home that he's reaching, and really reaching, the right audience in a way that NASA has struggled with for decades. He is exceedingly well-educated and is probably aware of declining interest in STEM among younger kids and especially declining interest in space travel as a whole. (I don't have data to back that up, just basic anecdotal experience much like you, but it seems true.)

[untog]

I can believe that he has impacted kids. I'd be interested to know how widespread coverage of what he's been doing has been in schools- and how far it extends beyond suburban middle-class kids.