Not to suggest any sort of conspiracy, but why is it that this link has (as of 4:21 EDT) 103 points, 43 comments, and was posted one hour ago, and yet is ranked

Not to suggest any sort of conspiracy, but why is it that this link has (as of 4:21 EDT) 103 points, 43 comments, and was posted one hour ago, and yet is ranked 33rd on the HN homepage — meanwhile, the #1 ranked link, also from an hour ago, has only 20 points? And an 11-hour-old 13-point link is #13? Does it have to do with the poster's karma or recently-joined status, or the linked site? I'm genuinely curious what goes into this ranking.