Audiofeil, I'll stick with my assessment. You dismiss me as an amateur, but I also have many years of experience in multiple systems. I have friends in the industry with well regarded ears who tell me my system sounds excellent. That doesn't mean I'm right all of the time , and even though at the very top end it comes down to a matter of preference, if I say it sounds horrible you can believe me.
The only thing you bring to this discussion is that several manufacturers told you that shorter was better. I say, which is backed up by other dealers on this thread, that some manufacturers say longer is better.
The only way I have to resolve this dispute is to try it myself, which I and others who have posted here have done with very clear results.
When I tried very short speaker cables it sounded horrible.
What were your results when you tried it?