But do from anecdotal evidence without benchmarks?

Did I suggest that?

Sometimes you just have insufficient evidence to be sure of something either way, and nobody gets to win the argument or shut somebody else down.

In this case, some have reported analytical work[0] that goes beyond "gut feel" anecodotal evidence, but even that's not going to conclusive and may not be trustworthy at all.

[0] https://www.reddit.com/r/ClaudeCode/comments/1xr9x5y/the_ner...