Is it really based on Google metrics? Google has been blocked by the Great Firewall on IPv4 networks since last year, but is still reachable via IPv6. So a Chin

Is it really based on Google metrics? Google has been blocked by the Great Firewall on IPv4 networks since last year, but is still reachable via IPv6. So a Chinese who accesses Google either does it with a foreign IP (VPN or proxy), or with an IPv6 address within China. That would put the statistics close to 100% IPv6 usage.