I wonder if that's something the algorithm can detect?

Measure the time between when someone clicks a link to the article and when they upvote it, compare that to one of the "estimated reading time" metrics of the linked page...

(Which, of course won't work, because at least some people (ie me) open a bunch of tabs for everything that looks interesting on the homepage, then spend a few minutes at a time over the entire morning choosing a tab and reading/voting...)

I had no intention of posting this to HN (someone I don't know posted it!) and also didn't expect more than the 10 people I shared it with to actually read it - no vote bait intended! I'm happy to take your feedback on a better title that is less baity and more apt.