In general, I would agree with Walter. My way of wording it would be that the closer the system is to doing everything right, the more critical it is to get the very last thing right; in other words when the system has the inherent capacity to reach a very high level of sound then the slightest defect is even more pronounced, is even more noticeable. Further, the settling in is allowing the second order effects to reach an equilibrium, and this is specially relevant to cables. Most cables, and this is even more so for esoteric ones with complex constructions, when they are moved in any way a lot of stresses are created in the various materials used in the construction, which need time to then settle in and adjust to their new positions. As these internal stresses of the cable naturally ease with time, so do the second order effects diminish and the sound improves ...
Frank
Frank, I think this might be the first post that I agree with you on. In audio, like in most things, IMO the system can only be as good as its weakest link. Additionally, I do believe in Ivor's old saying...the front end has to be correct otherwise everything following will simply be diminished...the old saying "garbage in--garbage out"