The rig isn't that hard. Spin n glo, bead, hook with the color yard I gave.
Actually, the one thing that makes this somewhat plausible is the spin-n-glo.
One can cast for pinks and cohos successfully in the fraser with almost no visibility using spinners, spoons, spin-n-glos etc.and obviously no one doubts those fish actively bite. Fish have excellent ability to detect vibration and movement. It's not beyond belief that using a spin-n-glo instead of a corkie or plain wool is the major factor in your 'magic rig'.
Requiring any specific shade of wool is probably overstated and I would guess is a result of confirmation bias. Nothing I have ever seen nor heard about salmon fishing in any condition would suggest that an exact specific colour exists that would consistently get fish to strike day after day when no other colour is even remotely effective. The suggestion that it would make much difference at all in the silty Fraser is hard to believe. Not meant to be a criticism, but it's in direct conflict with what we seem to currently know about salmon fishing. If it turns out to be true, it would truly be a revolutionary and amazing discovery.
As for leader length? I dont know, it's clear that a leader of sufficient length is probably required to give the spin-n-glo enough 'freedom' to operate properly in an uninhibited manner for the right action. Whether that is 1', 3', or 10' is speculation. But you also cant deny that the probability of flossing, intentional or not, increases exponentially with leader length.
I'll accept your claims at face value, but you have to realize that using what can only be described as a flossing rig yet have almost all your sockeye legitimately bite puts you in the 0.01% of fishermen. You are literally out-fishing all the other casters on the Fraser combined. Congrats on your success, but the implication that any technique requires such a specific set of conditions such that the top fisherman can outperform the next 1000 competitors collectively is what is making others so skeptical, to say the least.