On Jul 9, 2015, at 9:31 PM, John Curran <jcurran@arin.net<mailto:jcurran@arin.net>> wrote: ... Both techniques indicate more than 20% of the US Internet users are connecting via IPv6. You might also want to review Paul Saab’s presentation regarding what Facebook actually sees for IPv6 traffic and performance (given in March 2015 at the World IPv6 Congress) - <https://www.youtube.com/watch?v=An7s25FSK0U> They are seeing 9% of their traffic via IPv6 and doubling each year. This is likely because US mobile providers strong support for IPv6, with more than 80% of mobile devices on a some mobile providers supporting IPv6… (They’ve also observing a significant performance improvement with IPv6 connected users over IPv4 connected, but they admit to still looking into the reason behind the performance lift) FYI, /John John Curran President and CEO ARIN