Definitely. The content on Stack Overflow is heavily weighted towards languages and specialties less likely to be of interest to older programmers. We (I'm 51) are far more likely to be working on infrastructure and devops than on front-end. To do it, we're using C, maybe C++, maybe Python or even perl and bash, not Java, definitely not JavaScript or any of its variants, or Erlang, or Clojure, or whatever. Not always, but much of the time. The things we need to know are scantly represented on SO.
The atmosphere on SO is probably also more of a turn-off for older programmers. Those who are established don't need to bulk up their karma on some website, and the one-upmanship from the resident karma whores gets tiresome really fast. So does the rules lawyering that leads to answers being hidden, questions being closed, and so on. The few times I've found myself there, it has seemed like a game and a distraction that I just don't have the time or inclination to keep playing, so I get out and don't come back for months. For those with broad work responsibilities plus homes and families and other outside connections, life's too short to spend much of it in a virtual mosh pit. HN is enough for that. ;)