Maybe a bit. We procrastinate and are motivated by karma here, but I don't feel like HN is an engine finely tuned to keep us addicted and returning. I don't get notifications on replies or when there are new stories. In fact, there are specific settings to help people take breaks from HN.

It doesn't need to be finely tuned, for some of us :(

I come here to learn about articles and topics and discuss them with people who can debate calmly and rationally.

I don't get any of that on Facebook.