I can't speak reliably about the tech-savviness of cohorts I don't interact with regularly, but...
My wife and I have a relatively large group of...similarly-aged?...people we interact with regularly, and their tech-savviness is all over the map. We have friends who don't have their own email accounts (or who share one); on the other hand, one senior-citizen member of our local artists' group built a new web site (Google sites) in literally a couple of hours. (Note: No actual coding involved, but considerable understanding of how things work together.) The photographers in the group tend to be considerably more tech-savvy than the painters (not surprising, given where photography is these days).
My offspring? Three of 'em, 28 to 39, plus significant others, all very knowledgeable. I don't know if there are many tech-clueless people in their cohorts.
I suspect that's the difference - there are people in my cohort who are very knowledgeable (heck, there are older people; when I was with the NJ Commission on Science and Technology, we dealt regularly with people older than us, at places like Bell Labs...calling these people "tech-savvy" would be an absurd understatement!), but the variance is very high. My impression is that there's considerably less variance in younger cohorts, at least in the use of modern tech devices and platforms; not so sure about understanding what's "under the hood," as it were. I know that even in my very small sample (the kids), only one of them is comfortable with discussion of quantum mechanics and the implications thereof for the devices they all use and take for granted. So I"m thinking there's still considerable variance in younger cohorts with regard to deep understanding of their hi-tech world, while there's general "savviness" about living and using things in that world.