In Austria not having IPV6 support is a feature, and I assume it's that way in many countries. If an ISP rolls out IPv6 for you here you lose your public IPv4 address (DS-Lite).
So if in your country some ISPs are too slow to roll out IPv6, may be they have plans worse.
Just because an ISP is rolling out CGN and IPv6 together doesn't imply that IPv6 is an anti-feature. It's certainly better to have CGNv4+IPv6 than CGNv4 alone.
Australia has a decent number of allocated addresses, around 2 per capita (compare with India, with 29 addresses per 1000 persons)[1], but presumably they will have to be reclaimed from existing users.
A newly started ISP in Australia could get a maximum of 2048 IPv4 addresses from APNIC. [2] If it needed more it would have to transfer them from another owner.
[1] http://en.wikipedia.org/wiki/List_of_countries_by_IPv4_addre...
[2] http://www.apnic.net/community/ipv4-exhaustion/ipv4-exhausti...