Slow speaker cables?

Okay, so what's the deal here? What are you hearing that makes a speaker cable slow or fast? I don't get it. You tellin me that with fast cables, the kick drum is right on time, and with slow cables that it's just a fraction of a millisecond behind, and you can hear that? Huh!?! Wouldn't a slower cable slow all parts of signal down, not just one part? I don't get it.