Hmm I don't know if they've updated it, but I'm not smelling any of the Claudisms I know so well. No convoluted sentences, metaphors, therapy-speak, 'it's not' constructions, "load bearing" etc etc.
The one that gave it away for me was “a request that arrives with no credentials gets 60 requests”. Nobody speaks like this, almost everyone would say “unauthenticated requests are limited to 60 per minute”, unless they’re writing a LinkedIn post which Claude seems to think it’s always doing.
It’s the structure that really gives this one away. If you were writing a blog post about introducing limits you wouldn’t explain what HTTP 429 is or what the behavior would be like. It’s a rate limit.