Digg jumped the shark 2+ years ago (IMO), right around the time that SEOs started spouting Digg == Free Google Domination
They were on to something big for a while, but it was like social media faked left, then went right, and Digg is still off running to the left.
That would be right around the time they stopped listening to me. No I'm not egotistical ;-) I probably would have fit in better there if I had been.
Shouldn't he be using median rather than average values? Zaitratsu could have just had one mega-posting and a bunch of mediocre ones. AFAIK, the conclusions he's drawing, while they may be true, aren't supported by the data he presents.