There seems to be a mysterious phenomenon where a question gets upvoted a lot, which presumably implies that people find it interesting, so one might imagine that they would also find the answer interesting, but then when it's answered the answer receives only a few scattered votes. This has happened with several answers of mine, and currently it seems to be happening with mjqxxxx's answer to this question. This answer has been around for $8$ hours now; as far as I can tell it seems to be correct and to fully answer the question, and so far no-one has claimed otherwise; yet only one person except for me has upvoted it. Note that not only does the question have $18$ upvotes, but it's also been marked as a favourite by $5$ people, so the answer can't be merely that people upvoted the question and then forgot about it. Perhaps $8$ hours isn't such a long time, but often answers to much less interesting questions with far fewer upvotes get $10$ upvotes within an hour or two. In other cases I've observed in the past, the upvote count stayed low permanently.
I don't know if more can be said about this than just "the ways of the upvoter are mysterious", but I'd be interested in any insights into the dynamics that might be causing this effect.