There's an interactive map of IPv6 adoption at https://carteipv6.arcep.fr/ which does indeed show Germany at 4th in the World, behind France at 3rd and India at 1st. The figures are the an aggregate of adoption data measured by Google, Akamai, Facebook and Apnic.It does seem like Germany is pretty good at getting their citizens to go along with adopting new technology most other people are afraid of
There's more on the speed of adoption in France (in English) at https://en.arcep.fr/news/press-releases ... 10423.html, which shows that it's slow adoption by web hosting companies that's the biggest problem, at least in France.