ALL human beings are racist and always will be. You cannot completely eradicate 'gut' pre-judgments which are the foundation of 'racism', 'sexism' and any other discriminating judgment. But this applies not just to race and sex, but to simple interactions with human beings. Human beings 'profile' for a reason. It is a part of our innate defense mechanism. "Something is not right about this person."
So, in that respect, Aussies are no different. They're wonderful people, but of course they'll 'pre-judge' a person that they do not know, just like anyone else.
That being said, many Australian women are obsessed with black American men. Most will openly admit it. To many, they are the ultimate sex symbol, buying into the whole exotic guy with a large penis. THAT TOO is a form of racism, but I doubt that any black American man that finds himself in Australia would complain about THAT 'racism'.