Hard to prove anything in a blackbox. But domain registration length is something most people think is considered. Take a look at http://www.searchenginejournal

Hard to prove anything in a blackbox. But domain registration length is something most people think is considered. Take a look at http://www.searchenginejournal.com/infographic-googles-200-ranking-factors/64316/ http://www.searchenginejournal.com/infographic-googles-200-r...