It still feels strange to me. Makes him sound like some kind of exception, genius of his age or whatever - even if it's not intentional.
Maybe that's just me considering it perfectly natural, given that just a few years ago at age 17 I've been already working on large portion of GNU/Linux distro for Openmoko phones and I knew a lot of people at the same age doing lots of other cool and meaningful stuff. I haven't really noticed that "cultural narrative" you're talking about.
If it was 7 or 10, I'd be impressed. At 17, most of people are already capable enough to both learn how to write browser extensions and to care about politics, so he could be 27 or 37 and it wouldn't make a big difference to me :P