Youtube over IPv6 for non-whitelist users?

[Ben Jencks]

I just noticed that I'm getting Youtube content (just the movie streams, not the web pages -- still no AAAA on www.youtube.com) over IPv6, despite not using a whitelisted resolver. I'm guessing the Flash player is doing some quick connectivity checks and serving over IPv6 if available. Anyone else seeing this? Has Google publicly stated that they're doing this? Is it new since v6 day?

Since the movies are the bulk of the traffic to Youtube, this means that from a traffic volume perspective, Youtube essentially left v6 on after v6 day. I'd love to see some IPv6-enabled eyeball ISP traffic graphs before, during, and after v6 day.

FWIW I'm on Comcast using their 6rd deployment (which they're turning off at the end of the month, boo!).

-Ben