I've never understood why Aussie and Kiwi music has such a hard time cracking the US and (to a slightly lesser extent) the UK. I can understand why some other countries have thriving music scenes that don't go international due to a language barrier, but that doesn't apply at all here.
Yet if you ask anybody from another English speaking country to name an Australian band, you'll be lucky to do better than AC/DC.
Look on RYM and practically everybody's music maps are concentrated on the US and UK. Even those of many Aussies and Kiwis!