A comment in a forum says some search engines rank new sites high in SERPs for sometime. People call it the New Content Boost. This boost can make sites rank high in SERPs but this boost is temporary. Bing however, do put quite some weight on site age.
http://www.bing.com/community/forums/t/651807.aspx
Retail SEO is becoming more complex. Major organizations are seeing the need to form SEO Monopolies under brand names, product names, and strategic keywords.
