My thoughts are that he knows everything about HIS swing, never hit a really bad shot in 36 holes. Its very clear how he took Tiger 90 holes. If he could putt he would have won ALOT more out there.
Everything moved right to left, distance control was impeccable. I easily hit the same amount of high quality shots but his misses are barely even misses where i had 7 penalty shots for the tournament. He made 2 birdies, no bogies today. Very monontonous golf, fun to watch. Perfect for the US Open and its no wonder he loves that event.