This is mainly due to mobile devices only being issued ipv6 addresses by the telco 4g networks. They are the only ones using ipv6 on the millions of clients scale.
Most mobile devices are only issued an IPv6 address and therefore when the masses do google searches it uses IPv6 and makes it look like there is huge adoption.
You seem to be asserting that dual-stack machines use IPv4 by default, but that's not really true. If your machine has both IPv4 and IPv6 connectivity, browsers will in fact use IPv6 to connect to sites that support it, like Google. They prefer IPv6 by default and fall back to IPv4 if IPv6 is slower (Happy Eyeballs algorithm).
Of course, random software can mostly use whichever it wants, so I'm not claiming every process on such a machine will use IPv6, but most common stuff does.
Not saying its like that everywhere, but Im not seeing IPv6 default usage on dual stack systems in my experience.
If you're on a Linux machine, check `ip -c addr show` for an address that's "scope global" and doesn't start with "f". Those are the ones you need. If you have one of those, check `getent ahosts google.com` to see if v6 is being sorted before v4 in DNS lookups, and then `wget google.com` to see if wget prints any errors connecting to the v6 address.
If you have GUA addresses and nothing is outright broken, devices and software that support v6 will prefer it over v6.
You are simply misinformed. Either your setup doesn’t actually support IPv6 (or it’s much slower than IPv4 due to something being misconfigured), or you turned it off at some point, or you’re making a mistake in how you measure it. Because IPv6 is used by default on systems that support it. You don’t have to take my word for this, you can google it or ask someone else to try it.
So that measures everybody who has working IPv6. https://www.google.com/intl/en/ipv6/statistics.html
To me the specifically does not say, “could you” reach the servers but “did you”.
Because of Happy Eyeballs if you measure whether your users did use IPv6 you don't find out whether they could have done so, and so your results will be thrown off by happenstance.
I don't understand your logic. How does a large amount of devices using IPv6 to connect to IPv6 servers only "make it look" like there is IPv6 adoption but somehow it shouldn't count?
Most other large eyeball networks have as well.