I met and watched Jim Teeny fish Skier's pool on the NF Stilly in the mid 70s. He was with Bill Marts (I think), who was filming Jim fish. What I saw wasn't typical nymph fishing as I've understood and learned it. It was still a wet fly swing. The difference was in the method and application. First step was to spot a fish in a position that could be fished to. Then it was a matter of positioning yourself and adjusting your casts until every single cast would consistently swing in front of the fish at its level in the water column. The fish would either eventually strike or leave and move to another location. I presume that's how Jim came up with the phrase, "I spot 'em; I got 'em!"
I tried it, and it worked. It's just not how I prefer to fish.
I think the trench-like streams you're describing Joe, are typical of what contemporary steelhead nymphing technique was designed for. The holding water is cold, narrow, deep - relatively, and best suited to a nymphing presentation using a floating line, long leader, and either a weighted fly, or fly with split shot on the leader. The presentation is almost classic Leisenring Lift, such that the swing of the fly is not horizontal across the holding water, but vertical, from the stream bottom up through the water column in front of the fish. That could be a variation on the Teeny method, but surely fits the, "I spot 'em; I got 'em" concept.