If user metrics is Plan B, what's Plan C?
What's easier to do if one's goal is to "game" Google?
- create a webpage with a link?
- create some-"thing" clicking on links, staying on pages for a certain amount of time, etc?
User metrics isn't realistic... Billions of dollars poured into "AI" that will determine the usefulness of a page according to EACH indvidual term's value to a searcher?
Forget billions, let's try Trillions of dollars on a unpredictable technology that will probably not be any more "accurate" than PR?
As I've said before, a user-metric based algo would be an ambitious/borderline-crazy goal for Google '96, brainstormed college project by 2 of the most brilliant minds on the planet.
It's simply a laughable goal for Google 2008-?, a publicly traded company that has monetary responsibilities Google '96 did not, and missing the 2 brilliant minds.
As Churchill said,
"Democracy is the worst form of government, except all the others that have been tried"
"The PR algo is the worst form of Search engine, except all the others that have been tried"
Not to mention -
2 brilliant minds is always > 10,000 semi-geniuses
when it comes to true innovation.