Wilburforce - 10:49 am on May 24, 2013 (gmt 0)
Wilb, how did those results change due to this Penguin update though?
Not much. The only major change is the PR3 site with the strongest (but spammy) backlink profile has now vanished completely. That site knocked my site off the #1 spot pre-penguin, and has held on throughout.
My site vanished with the first Penguin, and in the last year most of page 1 followed it. A couple of weeks ago there were three ex-page 1 sites including mine on the same results page (from memory it was page 46), with several dotted about in places like page 38. Google seem to be modelling their behaviour on Henry VIII.
I'm wondering, however, whether some Panda-Penguin interaction is involved. The site mentioned above follwed a very similar trajectory to mine: rock-solid at #1 for quite a long time, then a gradual slide to the lower-end of page 1, then gone. Possibly some page- or site-based Panda threshold is taken into account when Penguin runs.