Does anyone want to weigh in on how much longevity plays into search engine positioning?
Take two sites: both are really equal in terms of search engine optimization, and both have an equal number of inbound links. But one has been on the Web six months (long enough to get indexed by everyone), and the other has been on the Web for seven years. Which one ranks higher?
I have a long-standing suspicion that engines take longevity into account — they look back at their indexing logs to find out how long a site has been in their index — when ranking sites. This is completely independent of other factors, like code optimization and PageRank. When all else is equal, the older site wins.
Anyone want to agree or disagree? Does anyone have any documentation to this effect?