With Neftlix and Youtube using IPv6, the majority of traffic of an average household may as well be on IPv6 already, where available at the last-mile level.

We're measuring 'eyeballs' based on google advert placement. And, China is notoriously hard to measure because of the GFC but that said, my contacts inside China confirm that globally routable IPv6 deployment inside China is stalled at a very low level, except for in CERNet, the academic network. This may change soon, it depends.