About two months ago we restructured our website and through consolidation eliminated a bit more than 50% of our webpages. A week ago the 'PageRank not yet assigned' indicator in Google Sitemaps jumped significantly from a tiny bit of green that accurately reflected new webpages not yet ranked to roughly 2/3 full. Does Google consider a page that has it can no longer find or one that is restricted to robots 'PangeRank not yet assigned' before it delists the page? Or is the indicator telling me something else, for example Google is in the process of delisting other webpages?
I'm guessing that the "pagerank not assigned" yet pages are eitehr pages that have gone supplemental because of disappearing, or that the pages remaining just have a higher percentage of new content - did you keep the newer material and lose the old?
These are just guesses - somebody more learned here will be able to tell you more...
I think that one of the google data centers is not updated on all of the page ranks. Those who lost position in Google from the 18 November on might be experiencing the data being displayed by this left behind robot.
One thing is certain...those who have lost ground have also experienced a large increase in "PageRank not yet assigned" in their Google Sitemaps.
Interestingly, when checking site through the errant spider, they're right.....most of my pages don't show a rank yet.
But when going to other data centers, my pages are all ranked.
Yet in the sitemaps, it continues to report a large portion of my pages unrated.