There is a lot of bickering here, and very little backing up of arguments.
While it is difficult to argue with someone who says that they themselves hear the differences between cables, if only because you are not sharing the same ears and brain to process the signal received from said ears, perhaps the naysayers could explain the reasons for not believing there to be differences?
Might even help to know what equipment was listened to and perhaps even the style of music? No willy waving, purely for reference.
For example, I can’t imagine anyone could pick the differences in cables while listening to whigfield on an alba…
My stance: I can easily tell the difference between some cables, and struggle to tell others apart. Some amplifiers reacts differently to speaker cables due to the construction of the output stage and available power, amongst other reasons. I do not believe there are any magical noise pixies at work. I do believe that electrical properties and interaction of those properties between various pieces of equipment are pretty much the only reason for sonic differences. Cost has pretty much nothing to do with it.
For reference, I listen to various types of music, from Mark Lanegan to The Dillinger Escape Plan via Radiohead, through a Rega Saturn CDP, Naim Nait 5i amp and Jamo Concert 8 speakers wired together with Rega Couple interconnect and Naim NACA5 speaker cables. I use these cables because they have been designed to work properly with the components of their name sake and are not excessively priced IMO. I have tried others, I moved them all on. Nothing was better.