If that anecdote is true, they're doing something wrong. What I hear is there is no performance impact in general, with some reports of bulk data moving faster with IPv6 (probably due to some kind of MTU issue).

Regards
�� �� Brian Carpenter

On 14-Jul-22 09:16, Juha Saarinen wrote:
> Anecdotally, I���m hearing that some smaller ISPs don���t run IPv6 on their networks because it kills performance for their customers.
>
> Doesn���t seem like the right way to fix the issue, but small budgets etc.
>
> ���
> Juha Saarinen
> https://twitter.com/juhasaarinen
>
>> On 14/07/2022, at 08:52, Matt Brown <matt@mattb.net.nz> wrote:
>>
>> ���
>> Globally https://www.google.com/intl/en/ipv6/statistics.html <https://www.google.com/intl/en/ipv6/statistics.html> shows steady growth, and just passed the 40% native IPV6 mark. It's slow but steady progress given the enormity of the protocol changes introduced and the lack of backward compatibility.
>>
>> However https://www.google.com/intl/en/ipv6/statistics.html#tab=per-country-ipv6-adoption <https://www.google.com/intl/en/ipv6/statistics.html#tab=per-country-ipv6-adoption> does show NZ is lagging the average on only 19% - anecdotally, none of the 3 ISPs I've used recently for various residential connections�� have made it possible to get IPv6 - Starlink did for a few months initially, but then it disappeared when they moved to their NZ routed ranges :(
>>
>
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