Very short speaker cable length recommended?

Cable makers price their product by the foot. What would you expect them to say?
My 3 foot Goertz are intended to simulate having no cables at all, which is what I think would be best. Supposedly the Goertz stacked flat wire configuration gives electrical characteristics which are not only ideal, but also, apart from resistance, are not affected by length.

If cable lengths between 6 inches and ten feet affect the sound for better or worse then either your cables or your amplifier (or both) are lousy. IMHO or course. I use 4 ft biwire Goertz to my Maggies.