I agree that electrostats and ribbons are at least as fast in terms of actual response time as dynamic drivers. With "hyper-fast sound" I am attempting to describe a sonic characteristic, what I think is an artifact, that I hear from Tidal, Zellaton and maybe Magico.
You may be correct that what I am hearing might be due to solid state amplification and not something inherent in the diamond or otherwise special drivers of such companies' speakers. You are a tube guy so of course you do not care for the typical characteristics of solid-state amplification. I am tube guy too, so to be fair and balanced I hesitate to characterize the sonics of solid-state as a coloration.
Since I believe the tube sound versus solid-state sound preference is subjective I am not sure that a tube guy characterizing the sonics of solid-state as a coloration advances the discussion. I prefer to leave it as a subjective preference.
Any member who enjoys Magico or Tidal or Zellaton speakers driven by solid-state electronics should feel very free to take this tube guy off the hook right now and take the ball from me and carry it forward on this issue.