What a terrible logo design, and semingly no real buy-in from any major organization. I'm not surprised this doesn't have any traction.

I think an IPv6-compliance logo scheme would be a good idea, but it should be driven by major commercial vendors like Apple, Microsoft, Google etc on the software side, and supported by industry forums like the WiFi Alliance and the GSM Association on the hardware side. I would love to be able to ditch IPv4 entirely for running large production networks.

I think Apple have already started to enforce IPv6 support on iOS apps. It would also be interesting to audit open source projects for IPv6 support; just the presence of the appropriate API calls would probably be sufficient for a first hack to tell the difference between IPv6-compliant and non-IPv6 compliant applications. This would allow influential distros like Debian to start the process of deprecating old software which is incapable of working properly with modern networks.