If it delivers on being faster than the version accused of cheating with reasonable cache settings and no SQL feature limitations, I would say that resolves the accusations, regardless of the source code of -preview.

The remaining lesson here is that one should temper one's excitement with pre-release software, whether the software was built with AI or not (rather, especially if its built with AI). The preview results would have been more appropriate to announce on a social media platform than as a PR to the ClickBench repo.