Michael, you could throw in Furyk, who is only 6 shots back, Dunne, who putts using the two thumb grip, Scott, who uses the broomstick, and Garcia's saw grip, and the message becomes that "conventional" putting simply may not be a great way to putt under tournament pressure; there are just too many things that can go wrong. I'd go so far as to argue that the best putters over the decades have simply been those great enough to overcome the inherent issues with vision, alignment, and the stroke itself.