Does raising speaker cables off the floor really make a big difference?

I tried this years ago when I first bought expensive cables at the advice of the salesman. I never noticed a difference then, tried it a couple of times since still never heard a difference. This always seemed  to me as one of the more questionable notions in the tweak universe. 

I hate to be the one to bring this up but there appears to be an awful lot outliers here. That’s a shame! Keep on trucking, mama, truck those blues away! 🚶🏻‍♂️

I hate to be the one to bring this up but there appears to be an awful lot outliers here.

@geoffkait   Are you surprised? ...   : )

Come to think about it, I already have a test setup for this baloney. I'm running an 8' pair of Audio Art that have improved the SQ from the previous Tara Labs. One channel is routed on the floor. The other through the floor it and then suspended though joists to the speaker.
The phantom center channel is rock solid between my ESLs.
It sounds like my Raal ribbon center channel is playing when it's not.
I hear and see no reason to suspend the second channel's cable
Nuff said.

I’ve tried it, but couldn’t hear a difference! I suspect much about cabling is overblown!