@revdisk perhaps, but the pain is unavoidable at this point. What should we do, wait another 10-20 years for IPv7 to be designed and rolled out? Technically competent people can get dual-stacks working, even if it's not always trivial. The OS and embedded router manufacturers dragging their heels deserve most of the blame for the current dual-stack misery. Maybe some ISPs are running broken DNS servers too, but I wouldn't know.
I'm interested in what the latest official OS/X version gets on that test, out of the box, assuming no ISP IPv6 support and no IPv6 tunnel.
@Ben I assume that's some sort of Windows? I tested it on an old but up-to-date XP box I have (firefox) and it got the same: 7/10 and 0/10. I can't check with Win7 because my win7 box gets 10/10 as well (my linux box is offering radvd advertisements for all my "real" computers, including the Win7 box)