What I find interesting is that the median scores are so low for most of the sites - none of the top ten sites has a median above 2, and there are only six sites with a median above 2 in the whole list. Not that I am sure what it says, but in the context of recent discussion about improving HN using reverse karma for submissions and similar ideas it seems to indicate the degree to which acquiring points is somewhat based on luck of the draw - i.e. there have been about 5000 crappy <i>TechCrunch</i> stories posted to HN which could not get more than two points even though a story gets additional points each time it is submitted.