Fly guy perspective: As long as Doc's definition prevails (seems to me it should), the only time leader restrictions become an issue when fly fishing is when sink tips are in play (or any sort of lead/tungsten/etc. is applied directly to the leader). For the most part, it seems to me the same standard should apply; anyone placing more than about 3 feet of line between any form of weight and the fly is either trying to snag (see the Kalama in September) or guarantee they won't catch fish, since longer leaders cause most traditional presentations to rise out of the "zone" much more quickly (In water with current anyway).

It will be interesting to see the "official" definition, but assuming it's on par with what we're thinking, it should not compromise any fly angler (any more than selecting fly gear for fishing Chinook does by itself anyway).