I can definitely attest to the fact that these catch fish. I caught 8 winter steelhead on the hot pink color last year by cutting them at about the 3rd ring up from the tail and tipping my jigs with that shortened tail section. I also caught 4 spring chinook this spring plunking these whole with a Spin N Glow. Both salmon and steelhead love them!
Last year fishing a smaller river for winter steelhead, I limited out within 15 minutes using these tails on my jig. 5 other guys fishing the same hole had not even had a bite. I offered each of them a tail and all but one took them. The end result? 4 guys nailed 6 fish in about an hour and the one guy that didn't want to take a tail from me walked out empty handed.
I have not tried drift fishing with them yet, but I'm sure they'll be just as effective. They're very realistic looking, life-like, and will provide any angler with "the edge" they might need to catch fish.
The only complaint I have is that when the fish hit these tails they often rip them right off the hook, so you usually have to "re-bait" after each fish. But you know what, that's something I'm okay with! :)