I don't generally get into the mechanics of any part of my swing, because when I do, it just screws me up. I certainly won't be changing what is already an effective putting stroke by anything I've read here. My stroke feels good and it works for me, and after all, that is what counts.
That said, mine is probably more Pelz than Utley, although I doubt that either would lay claim to inspiring it. My primary swing thought when putting, especially for putts inside of 10 feet, is to chase the ball down the target line, and to that effect, I try to finish square. I'm not saying that I do, but what I FEEL is that I am finishing square. In order to feel that I'm finishing square, I pretty much have to also FEEL like I'm starting square, which is why I say that I'm probably closer to Pelz in stroke shape if not in technique.
I've never read a book by either, so I'm only talking about what I feel when I putt. I've never seen my stroke, either in video or in a mirror, and I like it that way.