I run a site and have managed to front page off and on over the last few years and yes "the Digg effect" isn't what it use to be. The current crew is trying their best, but the site was a neglected child for a bit too long. Although I will say that there is still a loyal community there.

Sites like quantcast and alexia are more or less pure bullshit, quantcast even more so because they run a protection racket where you have to pay for their "monitoring services" to improve your rank. I would be suprised if digg was not much, much lower than that.

Haha, 1/4 to Reddit + 1/4 to Hacker News

digg dies ages ago, right after their v2 refresh. everyone is on reddit. (and HN)