Interesting: Google measures the availability of IPv6 connectivity among Google users. At the beginning of 2012 it was 0.4%, at the end of 2012 it was 1%. So it multiplied with a factor 2.5. That would mean 2.5% IPv6 Google users at the end of 2013. Not bad.
Oh, Teredo usage dropped from 0.1% to 0.01%. I had not expected that.
