c41lum - 12:37 pm on Dec 21, 2010 (gmt 0)
@sandboxsam that's almost exactly what Im seeing. Mine was more like the 10th DEC though.
Non of mine have returned, not even in the supplemental. Its like they have been black holed. Pages that link from the de-indexed pages have seen a slight drop, not as big as I would have expected though.
I think we should try and see if there is a pattern to the disappearing pages. Here's what Iv noticed so far:
Pages that have disappeared/de-indexed are "brand" related pages not product pages or category pages. When I do a site: search the number returned is Very Very high x3 what it normally is plus the home page is now sitting on page 2 it was one page 1 second position prior to the 10th Dec. Traffic is down between 30% and 40%. These pages have not been optimized or aggressively linked to. Pages are about 7 years old. Fresh content is added on a daily/weekly basis.
Not all brand pages have disappeared it only seems like 30% of the brand pages have been de-indexed. Iv checked the usual suspects i.e duplicates, hi jacks, blocked by robots and on page no follow and every thing seems fine.