Wilburforce - 7:43 pm on Dec 14, 2012 (gmt 0)
If there was a Panda or Penguin refresh, what data (on site and backlinks) would be used? Mid November?
On 1 December my index page (ex p1 until April, and ex #1 for over 5 years) dropped from p5 to p47 for main key term, having crawled back to p5, a couple of pages behind the key term page, since changes - both on and off site - implemented soon after Penguin 1. All the factors that might have accounted for its similar drop in April were removed before the end of May. If historic data are in this current set of changes, they might date back to April or earlier.