Google SEO Tip#2: Is PageRank Calculated Differently for Domains Registered Before 2004?
Matt Cutts: That is completely false. There is absolutely no difference between 2004 domains, 2005 domains, 2006 domains; they all acquire reputation in the same way.
There is literally no value to getting a pre-2004 domain or pre-Google IPO domain or whatever conspiracy theory you want to spew out. Please we have enough crazy SEO theories going on without new ones.
So no there’s no difference what so ever. Get a domain that works and works well for you and do not worry about whether it was created before 2004.