To be honest I agree with the views of most of the people in here.
Being born in a different country myself means I can see things even clearer. What happens is people immigrate from different countries then live in little sects of cities and stay together. They generally just stick to the culture of their home land and don't adopt any traits considered to be "Australian Culture".
I've seen this happen on so many occassions and that's why Age's view is partiuclarly valid. I honestly don't think it's good enough to move to a different country and then just live exactly like you used to with exaclty the same people you used to. It's extremely difficult adatping, my whole family has gone through it, but it's only fair.
But like people have been saying, it takes a few generations before they start accepting Australia's culture. The best example of this is Sydney, where you can pick out suburbs that different racial sects live, i.e South East Asians in Cabramatta, Lebanese around Bankstown and Punchbowl and Greeks near The Sans(not sure if that's right, considering I don't live in Sydney
).
In saying that, there are a few races who do make concerted efforts to get involved in Australian culture. Indians and Pakistani's definitely do it. Of course, I'm generalising here, but for the most part the generalisation is generally correct
Things will change over time considering how new Australia is and at the end of the day it is still a very multicultural coutnry.