OP was implying that because the US property boom and bust involved deception ("scam driven") that it wasn't a real bubble - only close to a bubble.

OP never mentioned Aus - only that they had heard a lot of talk of bubbles but hadn't identified any. I was just giving a few recent examples that I'm sure most would agree qualify as such.

This whole thread is based on an article about Aus. I think it's reasonable to take people's comments in that context unless otherwise specified.