Ethernet Cables, do they make a difference?

I am hearing that they do not want to try it because, they are so well qualified, they know it will not make a difference. 

@markalarsen and Clearthink:

Damn straight you have to prove it. I'm not delusional about the nature of my hearing and I know it's not a measurement apparatus. I acknowledge the factors that might effect my hearing, including hearing the exact same thing 3 or 4 times, whether I've eaten recently, if I've been around ambient noise all day, if I've exercised, or just being in a mood. Those factors played into my listening just yesterday. I started my day off listening for about an hour. Then I went out to ride some trails and ate sushi after. Sat down to listen later that evening and it just wasn't hitting the spot. I leave the system on all weekend and it was as stable as it was going to get. Analytically, it didn't sound any different, but somehow it wasn't doing something for me. Personal experience tells me these anecdotal stories of difference are ridiculous. It's not like the claims you believers are making can't be verified with some very pedestrian measurements. I'm sure none of you will though. 

Clean up on aisle 3. Angst and anger spillage.

kosst_amojan"Damn straight you have to prove it. I’m not delusional about the nature of my hearing and I know it’s not a measurement apparatus."

Of course we have to prove it and of course your not delusional! Also the world owes you a nice job a pretty girlfriend a house a new car and everything else you’re little heart desires and demands from people you don’t even know You are are special entitled exceptional and in fact deserve a medal and trophy just for making this post! Yup that’s damn straight fella no need ofr you to take any measurements or perform any tests or research damn straight everyone owes you that and more just keep demanding and maybe if you stomp you’re feet that will help too!

Dear Clearthink,

You clearly mistake me for somebody else. No, nobody owes anybody proof. But when they make statements all truth disagrees with, then they shouldn't be offended when they're called liars.