Dual stack statistics?

Mon Jan 28 23:38:32 CET 2013

On 28 Jan 2013 23:14, "Tim Chown" <tjc at ecs.soton.ac.uk> wrote:
> based on what a typical home user does, 50% of that content (Google, FB,
YouTube etc) is available via IPv6.

Does anyone know where they get this data from? Figuring out which websites
are dual-stack is easy (just ask the DNS), but how do they know which
websites users visit?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cluenet.de/pipermail/ipv6-ops/attachments/20130129/48003b6f/attachment.htm>