One observation I made is that these guys play very well when they're just playing golf. It's hard to explain, but you know it when you see it. I look at Speith, Hoffman, and to an extent Tiger, and you can see that they're just hitting the shots they see. Not much in the area of forcing anything. Speith and Hoffman especially look like they have zero pressure on them.
Now, are those 2 playing good golf because they are relaxed, or are they relaxed because they are in the groove and playing good golf, or perhaps a combination of the 2? I think it's a combination.