John,
So your saying if a person does a poor job at twisting the ends togethor there won't be any potential issues? I find this hard to believe. Back in the day when I was into installing car audio, I can't tell you how many times someone came to me with problems. Upon inspection, most people just twisted the wire ends a few times with their fingers and in many cases only half the strands were making contact. In addition, no electrical tape, or protective sheathing was used. After bouncing around for a few months, the connections would loosen.
Are you assuming everyone does a good job at splicing two wires togethor? I'm not saying Bill would do a poor job, but as you know we see a lot of people on here that don't even hook up the correct polarity, let along give attention to the connections.