IPv6 exceeds 1% of google search traffic (continuously)

In the ongoing march towards an IPv6 only Internet, IPv6 is not a speedy traveller but it did reach a mini-milestone this week.  Google reported that IPv6 traffic was greater than 1% of it's total traffic all week, on a regular ordinary week (well the week has the same basic shape as most non-holiday weeks).  Usage continues to edge higher and higher:

http://www.google.com/ipv6/statistics.html

Do I hear 2%?  (Probably not for a little while.)  Yes I know it is sad to be interested in this graph but hey, one has to be into something.