ortelius - 6:35 pm on Feb 28, 2011 (gmt 0)
It looks to me like something was added to the algo that devalued sites rather than a changed the ranking order. None of the SERPs I look at changed with sites moving up and down and all around. Sites got devalued. Other sites moved up as a result of them moving down. Does anyone else have this view?
That's how it looks to me also. That seems to be how it plays out in my niche. As for the different drops in rankings, such as some pages on a site -5, some -50. Could it be that the algo seeks to reduce Google traffic by X amount across a site? This would result in a wide variety of drops for different pages.