I'm in the lucky position where my ISP has rolled out IPV6 providing
a) You don't use their modem
b) You set up access using a method they don't support or document on their website, and support don't know about
c) You happen to be connected to a recently updated RIM that has a very specific piece of hardware and configuration
If you do that, you can happily use IPV6 and derive the benefits of using the IPV6 routes that no one else is using because it's become "first slaughter the right number of chickens", and suddenly find yourself with next to no congestion.