I am requesting explanations/opinions/knowledge/recommendations
Well the speed of light is 300 million meters per second, or 1 nano second/foot.. so a 6 foot cord will be maybe 10-15 nanoseconds depending on the insulation.
I cannot imagine much of an effect to timing would happen… the outlets in the wall are usually on the same piece of wire and
no one few claim to hear that.
I think they are having you on.