We have seen a lot of changes in Google index after the BigDaddy updates but it is to be noted that as per Matt Cutts, the Google Engineer,

QUOTE
The Bigdaddy update is independent of our supplemental results, so when Bigdaddy didn’t select pages from a site, that would expose more supplemental results for a site.


And that is the case actually happening with few sites reportedly out of Google index, but still they are getting traffic from Google through supplemental pages.

Matt Cutts Blog


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