Why Is This Toolbar PR Update Taking So Long?
Since reporting back on September 29, 2006 about the last toolbar pagerank update starting i have been occasionally looking to see how many datacenters are showing the updated pagerank (just out of curiosity), and im quite surprised to see that nearly 3 months after the last pagerank update about half of the Google datacenters are still showing old PR.
You can click this link to see what datacenters are showing new and old PR for the Pro-SEO blog. You will see about half datacenters showing PR 4 and half showing PR 0.
I don't know if this is unusual or not. I have never really been a fan of toolbar PR, since it's a meaningless metric, So have never bothered to check before. But it was my understanding that updated pagerank propagated to all Google datacenters over a couple of weeks after the pagerank update starts.
If this is something new it may be a way for you pagerank fanboys to predict when the next toolbar pagerank update will take place. You may notice that Google start exporting the next toolbar PR data when the previous update has completed and all datacenters start showing a new PR value.