I always use snubbers on dipsies and have never lost a fish that I believe was because of the it. On the other hand I use power pro and fluorocarbon leader not fluorocarbon line. So there is no stretch at all and the snubber makes a big difference. Just my 2 cents.
i use snubbers because I have just lost to many big hogs. it might not be the snubbers but I land more fish using them. so it gives me better piece of mind to have a snubber on.
when a big hog just bows up and stops coming in and you can feel her shaking her head it just makes me feel better knowing there is a snubber out there to take some of the shock out of those jerks. and it doesn't seem to bother the fish.