Google often does not reflect backlink updates or page rank updates in the main
www.google.com site. Once google goes through its monthly big crawls, the changes and updates are first loaded and tested in different but publicly available google domains. These are also called google data centers. If you want to be ahead of the competitions, you should keep an eye on them. I don't have the urls of the datacenters. But here are some IP addresses of the google datacenters that reflect google updates earlier than the main google.com.
216.239.57.104
216.239.57.99
216.239.57.105
216.239.57.98
Just type in the IP addresses in the address bar and you will be presented with yet another google interface!
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