I have throw my 2 cents in on this one. I just returned from 3 weeks in Australia. Roughly, eight of the days were spent in Sydney and rest in places as far reaching as Melbourne in the south and Cains in the north. Outside of Sydney, I found the people to be quite kind, personable and very friedly. It would not be uncommon to engage an Aussie in any type of conversation. You just got a sense that they just like other people. This goes for the hotel workers to a guy in a bar.
Sydney, was a whole other ballgame. At the gay bars/clubs, the guys were extremely snooty. Everyone dressed alike, hung out in tight small groups and were simply unwilling to engage in any form of conversation. I felt as though someone had transplanted The Abbey and WeHo halfway around the world.
I did not experience any of this in Melbourne. I am not sure why this is the case. I have some ideas, but that would be the topic for another post.
In closing, if you goto Australia, get ready to see some of the most beautiful and diverse scenery anywhere on the planent. But, with respect to Sydney, mdo not expect the gay nightlife to be any more friendly than LA or NYC.