I'll stick my $0.02 in, I think "advanced" is where you know what you are doings as well as why you are doing it adn what effect it will have prior to tasting the result.
As someone said most can follow a recipe to do a tripple deco brew or produce an amazing IIPA, and they can go on to produce 200+ batches/15 years worth of fantastic beer. But it takes an advanced brewer to know that by using this combination of malts, hops, minerals, temperature, etc. I would expect to have a beer that taste...
It is the knowledge that makes you advanced/expert not the time (although generally time -> experience -> knowledge)
Wait thinking about that I would correct that to:
An advance brewer knows why to do certian things,
An expert brewer can predict the results of certain things