The lower graph ignores the inlink data and generates it using the outlink data. This is more like the picture that a web crawler would have of the web, and what I was using after I saw that avva was ranked so high. It helps explain my latest results.
(Both graphs are chopped so that their axes are the same and so you can see the interesting bits.)
The user way out to the right in the lower graph? tsenft, the mystery high-scorer from before. This clearly indicates I need to crawl more data. :)