Forum Moderators: Robert Charlton & goodroi
Our largest site dropped from 80,000 results to 12,000 results in the site: command and it's traffic remained stable and actually increased. Unless your traffic has dropped I wouldnt worry about it to much.
I know they watch search result impressions, even if the entry doesn't get clicked. If impressions are too low, I assume that is at least one of the criteria for Google not to deal with the URL any more.
Another possibility - this one in the buggy area. Sometimes if you have a simple enough directory structure you can do site:example.com/directory-1/ style searches right through the entire site architecture. Add the numbers together and the total is more than you get with a site:example.com search.