Originally Posted by Narasinha

Perhaps Google has added P3P to the many factors in their algorithm, as they have done with the age of the domain name (See The Age of a Domain Name on webconfs.com).

It appears that they want to have some way to ascertain the reliability or trustworthiness of a page. Obviously, this is a very difficult thing to do with a computer algorithm, no matter how complicated. I guess the P3P information may be another of Google's indicators.