Simple question, or is it...

When you use just plain lamp cord, energy flows between wires. It is strictly not between wires since electric fields bends, but also outside of the cable in-between planes like picture below shows:

https://www.google.com/url?sa=i&url=http%3A%2F%2Fwww.vias.org%2Falbert_ecomm%2Faec06_transmissio...

"Way too much info"
Guilty as charged  :)

So, you guys are saying the energy is the signal? What is it that travels down the near lightspeed? Current? the EM wave? Surely not the Poynting vectors, yes? Something must be traveling down the inside of the conductor, otherwise the type of metal, gauge and purity of the conductor wouldn’t matter, yes?