Basically, your traffic is the number one player when it comes to ranking, but when they see that you are a 10 years domain owner, they will diminish the chance of you being a scammer, phishing site or an amature domain names owner. You will look more serious most likely get a better ranking.
n.b: The above answer is based on observation and experience, but it is not a guaranteed true answer as we cannot determine the underlying structure of the workings of the search engines.