They didnt mention that a lot of Australians go overseas to work for companies, which could be a boon for us if an ecosystem blooms here, as I know a lot of entrepreneurs would love to move back to australia for the lifestyle.
They did: "...influx of quality talent into the Australia ecosystem. These talents comes from the successful Australian engineers and designers who have left or will soon leave their careers at huge tech companies such as Facebook or Google to join or start new ventures back at home."
I think he is vastly overestimating the number of Australians over here.
I'm one of those Australians who moved to the US to work at Google, and then left to join a startup, Puppet Labs.
There are a lot of Australians in tech in the Bay Area, particularly working in operations, and a regular topic of conversation is "what would I do if I moved back to Australia?"
I'd still probably try to start a new tech company in the US, but I feel much less strongly about that than I did a couple of years ago, and hopefully that trend continues.
I think he is vastly overestimating the number of Australians over here.