snbeall - regarding cable theory - I am familiar with that Townshend paper and have kept up (as time and education allow) with cable development. Within the considerable snake oil in the cable corner of the market, I believe there is a lot of real, honest, verifiable truth. The stuff in the Townshend paper is consistent with my understanding of the arena.
As an anecdote, I collaborated briefly with John Dunlavy in the mid 1990s regarding cabinet design. I was amazed by John's grasp of and attention to wire considerations. John held multiple patents regarding antenna design, and thus paid close attention to electromagnetic and other propagation effects of signals through wires. His knowledge far surpassed my understanding, but his stack of patents and results in his speakers spoke volumes to me.
In general, I see parallel explorations between audio cable designers and high-level physics considerations, and much of the dismissal and ridicule coming from the engineering-oriented skeptics who want the designers to prove their points. As a manufacturing practitioner I know for certain that we plain can't afford the time, energy and approach of proving our improvements to anyone. We, as designer-manufacturers, have to do our innovating, get it to market and run as fast as we can to innovate again. Let the academic engineers fight it out, as long as our customers support our work.