karter - 12:09 pm on Jul 27, 2010 (gmt 0)
I'd be more inclined to believe that google and other SE's look for a clear patern of behaviour , that can be readily identified in code and therefore recognised by the Algo.
An Algorithmic solution is scalable, sites fitting a certain html code profile get nuked :)
Sites in certain Gwmt profiles get undue attending. For example, Folk who have submitted reconsideration requests, already been penalised for something, recieved links from similar pages to other penalised sites,,