Maybe unfair, but to me it seems Martin Colloms has been muddying the hi-fi waters for long time.
At the end of the article John Atkinson refers to a 1995 article by Malcolm Omar Hawksford entitled, "
The Essex Echo 1995: Electrical Signal Propagation & Cable Theory". That article seems to deal with the speed of propagation of signals within cables, arguing that aspects of the cable,
e.g. diameter, can adversely affect transmission.
Since I'm no electrical engineer, scientist, or mathematician it's all
gobbledygook to me but might be comprehensible to other people. The question is -- allowing for its from validity -- is it relevant to audio signals?