In the patent, Information retrieval based on historical data , among other things, the registration of a domain name and the date of the initial finding of a domain is a crawler presented as a possible ranking factors. In a screencast Matt Cutts confirmed the influence of the domain age, but at the same time made ??it clear that this priority to new (few months old) has websites influence.

A possible background here is fighting spam, because spam pages are excluded from recognition from the Google index, and thus lose their raison d'être. Therefore, the turnover rate is much higher than in non-spam domains in domains that are abused for spam.