If he is already enjoying what he claims with pre-Fable models, then it stands to reason Fable is already above that baseline, and therefore your nitpick is silly.
That both fair and also charitable to the commenter. It's not a given that Fable is "above that baseline," all we can go by is anecdotes and Anthropic's marketing materials. Both tend to be puffed up. And if they're speaking generally about LLM-assisted coding, they could have chosen to say it that way.
You sometimes meet someone and hit it off immediately. A fellow engineer, hobbyist, anyone. That is my experience after working with Fable since it launched and barely sleeping. I never had more nuanced, interesting and fruitful design discussions in my life. And I've been programming across the entire stack, from transistors to enterprise architecture, and spent 40 years around computers. Love is love, it does not need to be well researched and may well be misplaced :-)