We visited WDW for 2 weeks last November and didn't appear to run into any Aussies during that time (I'm sure they were there, just not in our vicinity at any given time). Most Americans assumed we were from the UK and treated us as a bit of a novelty when they discovered our true origins.
We then spent the following 2 weeks at DL and Aussies and NZers were a dime a dozen.
We didn't feel quite so special those second two weeks.