We have been trying to figure out Penguin since the day it landed and are no closer to a fix than most on here by the sounds of it. We are testing out more varied anchor text on one affected domain, removing keywords from internal links on another, watering down keyword density on another and increasing social media interactions on another, to see if any make a difference.
The only pattern we can see between the affected sites is that the home pages have mostly vanished. Internal pages are now ranking instead of the home pages, but usually nowhere near as high as the main pages used to.
Anyone seeing the same with their affected sites?
Any ideas what this means? Has Google penalised/filtered out the pages it saw as over-optimised but not the domain as a whole?