Odd length speaker cables

The difference is not due to timing but in loudness. The longer cable is a bit weaker in loudness due to its higher resistance. Moving that speaker a bit closer to the listener makes it a bit stronger in loudness.

The difference in loudness is equally trivial and inaudible but I guess you can convince yourself of anything if you try.

BTW, I see there was a typo in my original post.  It should read:
" How can you possibly relate these? Moving the speaker 1foot
changes the arrival time (at the ear) by a bit less than
1millisecond. Changing the cable length by 7
------------------------------------FEET--------------------------------------------
changes the arrival time by about 0.0006microseconds."

The signal travels at close to the speed of light a few feet in difference of a cable doesn’t matter. The higher resistance of a few feet will not change the " loudness" it won’t change anything.

Of course.  :-)

He claims that years ago he conducted double blind studies with

I stop reading here. You know this is BS, so whatever comes next is PhD- piled higher and deeper.