It is somewhat related ... but it's important to remember that PageRank is just one of many, many factors that impact a page's ranking.
There is heavy speculation that Google already weighs user data into the ranking algo. They know when a user clicks on Result 1, hits BACK, clicks #2, hits BACK, clicks #3 and doesn't come back. They know the user behaviour of every site that uses Google Analytics. Now, they will have data from DoubleClick's ad network.
Google Personalized Search will reflect your behaviour and preferences. They have even experimented with having users vote on SERPs.
Ryan
There is heavy speculation that Google already weighs user data into the ranking algo. They know when a user clicks on Result 1, hits BACK, clicks #2, hits BACK, clicks #3 and doesn't come back. They know the user behaviour of every site that uses Google Analytics. Now, they will have data from DoubleClick's ad network.
Google Personalized Search will reflect your behaviour and preferences. They have even experimented with having users vote on SERPs.
Ryan