Audiofeil,
I would not agree with the opinion that no one can hear the difference between spades or bananas or bare wire. However I would say up to a point it doesnt make a huge sonic difference.
These types of things are small tweaks and not like changing a source or speakers. For some convenience will be far more important than a slight change in noise floor or presentation etc. This type of attention to detail is for the hardcore audiophile/connoisseur.