Comment by dang

It spent half an hour on the front page and 90 minutes in the top 10 pages. You can call that 'hidden', but everything falls off the front page(s) after a while, so everything ends up 'hidden' that way.

The more important question is how much time on the front page(s) a story had, and whether it was too much time or too little. I think I've answered that in the GP comment and the other links there, but if not, let me know.