can still have negative repercussions for people -- not just women -- anywhere. That Aussie's intent was to insult, even if everyone there may be used to it. Don't believe that women there are used to dick language.
You can call redqueen 'in error' or 'mistaken' about the Aussie norm, but she's not "wrong" because you can round up some links. Battles of right and wrong aren't won by who's got the greatest number agreeing with their side.
Round up all your links and I'll still disagree with you, anyway, not because you can't find common use of "cunt" in Australia, but because, first, I have a stepson, daughter-in-law, two grandsons and a granddaughter there, along with extended family who I'm close to. None of them use "cunt" or approve of its use in public. They've told me that it's considered rude, crude and sexist to use it in front of women there, no matter how normed its use. My stepson has 'the accent' now and is acculturated, but he never uses that word. His Aussie wife would hurt him. By the way, Aussie society is pretty racist, too, yet they're by and large far from norming racist words like khoona, nunga or boong.
Second, for the reason I gave above, no one in the give-and-take of language politics is "wrong." That's a moral judgment. It's either appropriate or inappropriate based on the intent of the user and the effect the word has on the receiver. Half the planet still gets to weigh in on their body parts being used as insults. That's all that's going on here.
What's wrong is that Australian women who do object to its use don't have much say about it, or that American women here, who are their linguistic allies, are called "wrong" when trying to negotiate -- not dictate or enforce -- its appropriate use so that it doesn't add to an already violent, toxic air they have to breathe.