This is the voice of reason and logic! Thanks, hilde45.
Marketing gets into every nook and cranny. I think people need all kinds of ways to review and promote DAC’s.
My understanding is that a DAC might subtly influence the perception of sibilance, but it’s primarily an issue rooted in the recording itself, speakers, and room acoustics. A well-designed DAC should be transparent. Excessive sibilance is likely coming from recordings, speaker characteristics, and room acoustics.
If you have a significant problem with sibilance and you're trying to fix it with DACs, you will never fix the problem.