OK I am going to throw myself to the wolves here. I just had a trip to Ucluelet and caught and played a very nice size coho. I had 2 guys with me that weren't very good at identifying fish so made a point that no fish came in the boat,net, or gaff without me checking it first. Anyway the coho turned out to be wild and was hooked in the lip with a single hook that was on a 6" spoon. Very easy release you would think. I put the rod down, grab the leader with one hand and the gaff with the other. Popped the hook out no problem coho swims off and BOMB kicker stops. Point is, not every fish is going to make it no matter what you do. You try to do the best you can with the experience you have and hope for the best.