Has anybody noticed an update with Google's ranking algorithm around 19th November 2012?
I have read in various places that there was a minor Panda update on 22nd November which came after an unnamed larger update on 19th November, but I can't find any more info than that.
I have one site that was consistently achieving 3000+ impressions a day, dropped sharply from 19th Nov and now achieving only around 100 a day. There is no global change in search queries to match this trend, and there is nothing flagged in webmaster tools as being issues with the site, in fact numbers of indexed pages have continued to rise from this date.
Can anybody shed any light on wether there was an update on 19th Nov, and if so any info as to how it has affected the ranking of sites?