Aussie and NZ have been bickering siblings for a very very long time. Looks like this couple decided to voice their opinions.
http://www.stuff.co.nz/world/australia/2288366/Pathetically-rude-Aussies-upset-Kiwis
Oddly enough I tried to look up their website and it's currently down. I wonder if it's kiwis wanting to see what the aussies think or maybe they got embarrassed and took the site down :)
On a side note i find it odd that a "professional couple in their late 20's" they moved from aussie to nz?! Not the best move.