I agree with this, and can only speak of my experience with fondness after a year living in South Australia. So many times I have thought there must be something in the water as I don't think I have (personal opinion of course) met a happier bunch in my years of travelling. Of course everyone's experiences will be unique and i would say that what you experience will have a lot to do with your perceptions , values and general outlook on life. Aussie's are different , but I have never felt more welcome. They say it like it is and can seem pretty tough at times, but the majority are so laid back and from those I have met really seem to enjoy life and being easy going .
Again in my experience only, my young son and I have been welcomed into the community and people seemed to appreciate a positive outlook . Culturally there are differences but of course that will be the case, it's how you integrate ourself in those differences. It's comforting to meet so many English but I found my favourite friends in the Aussies :-) I love how on the country roads most people give you a wave and when you walk on the beach nearly everyone says hello and wants to chat.. Certainly don't get that where I live in the UK sadly anymore.