I think a lot has to do with the people doing the up/down voting. I'm guessing HN members who have been here longer and/or has more comment karma, carry signif

I think a lot has to do with the people doing the up/down voting. I'm guessing HN members who have been here longer and/or has more comment karma, carry significantly more weight when up/down voting. This would explains why such a low score would result in a post staying in the front page for so long. So even though the points maybe 4 from a cosmetic point of view, I'm guessing its actual score would be much higher due to the 4 HN members that voted up this post.