The processor's delay setting is intended to deal with the delays caused by the speed of sound (a very small number at the distances we're talking about, but a few milliseconds here and there lands just on the edge of perceptibility). Delays due to electrical signals traveling an extra few feet, on the other hand, are going to be massively smaller - rather than dealing with the speed of sound, we're moving much closer to the speed of light for the signal traveling along the wire. When Ritz mentioned nanoseconds, he wasn't kidding. The best numbers I could turn up in some searching was on the order of one nanosecond of delay per foot of wire - based on that, you'd need to run one thousand feet of wire (two tenths of a mile) to yield one microsecond of delay - which is still only 1/1000 of a millisecond.