I've seen it time and again on "highly pressured streams" I've even had it happen to myself, a guy fishes over a pool for a long period and doesn't catch anything, another guy comes along after the first guy leaves and BAM, he catches several fish over the next hour. How does this fit in with the "Highly Pressured Theory?" I say when this happens it just the angler using the wrong fly and he's getting refusals or the fly isn't even getting a look from the trout.
Keep in mind that on C & R streams the populations of fish are usually pretty high, and in many instances the fish are competing with each other for the available food, so cannot wait to see if more food comes down the highway. This is especially true when a C & R stream is heavily stocked. Trout have to make a decision to take a fly or let it go. If they don’t like the imitation that is coming down toward them, most often they will not even give the fly a look. Many times they will rise to something the angler can’t see that is near the imitation as it drifts, that is why anglers think they get a rise and when they set the hook nothing is there.
I’ll use the Little Lehigh as an example, 20 to 30 guys will be on the section from the foot bridge below the fly shop, up to fish hatchery road. A person would think that among all those people a few would catch trout, but quite often no one is catching even a chubb. Another guy moves up from downstream and is catching trout in every place he casts, including places vacated by anglers moving on, how can this be explained, if indeed the other anglers are not catching fish because the stream is “highly pressured?"
Jack, everything is different with hatchery raised trout, they don't act like wild fish, they don't feed like wild fish, and they don't survive and spawn like wild fish. They may look similar, they may even fight once in a while, but they aren't the same. You're statement says it all, "there is nothing inferior about hatchery-raised trout other than the habits instilled during several months of hatchery rearing."