I believe this same length wire is nothing more than internet legend. I do not see any reason the wires to be the same length. Same length, either the pairs to the track or different length star connections.
DCS sends a signal along the Hot to the engine and the engine answers via the common or vice verse. It travels 10 feet on the Hot gets to the engine and comes back on the common 10 feet and do what die. The point of the one drop per track segment is to avoid multiple paths of common and having the signal repeated.
You failed reading comprehension. Read my post about star wire length.