To my knowledge, a newly set-up planted tank with seeded media is not exactly an "aged" tank. So I do think I chose my words carefully. But of course, like all things, there are many interpretations. To each his own.
I have to agree with Yadokari. Typically when hobbyist refer to an "aged" or "established" tank they are referring to a tank that has been running trouble free for 6 months to a year after it has cycled.