Martin_Ice_Web - 10:15 am on Sep 13, 2012 (gmt 0)
i see the same, IP ranges are "crowded" then nothing then "loose" IP range -> crowded.....
After 3 good days, it is thursday and changing day for google. All rankings lost for our many information site.
But our affiliat site with no "EXTRA" information and copied description from the manufacturer ( and we are not the only one with this description ) is doing very well again.
edit: the main site gets only image search and foreign traffic.
Because of the ongoing development in real life the internet is changing at a daily basis. If it is machine learning - and this machine learns realy bad - then it will be behind this development for ever.