FWIW - I just posted the following on the similar thread in the Techniques section of the SpeyClave:
A point distinction: the post from the anglers who dead drift seem to be all from the Great Lakes steelhead fly fishers. The fall run GL steelhead over-winter in the rivers. The winters in the Great Lakes can be severe with many of the tribs completely freezing over. The weather and rivers dictate a different style of fishing than is common in the PNW or Scotland. Dead drifting, nymphing, and swinging, etc. all have their place in the GL steelheader's arsenal depending on the conditions. All of these traditional fly fishing methods.
I do NOT approve of C&Ding.