One heard three times today: "Australia is a young nation, so... [insert some whinging here]."
Puleeze. California's a young place, settled from the 1820's, but I don't hear that in California. Nor do I hear Singaporeans (founded 1965) or even New Zealanders (independence 1949) use this useless phrase.
Canada uses it all the time. :)
I would say more that some Canadians use it all the time.
I just thinnk that Californians consider about two centuries to be a long time.