Yes the "Matt Serra Effect". LoL
But hey, lets face it. He is a all rounder who can afford to come out with this perfect game plan (Taking striker down and Strike with wrestlers or BJJ guys). Not everyone can say that.
Besides, look at it from a champion standpoint. Why risk it when he is winning all the time? If I am a champion, I would rather win a boring decision than rushing madly at a opponent in a attempt to finish him but ended up being knocked out.
But in Jon Fitch case, he have to finish fighter to shad his "boring" image for Dana White to give him the title shot. In GSP case, he is already the champion. Thats the difference.