If you look at that last picture, in the final round of the 06' PGA, Tiger bombed a drive. Then took out a two iron/5 wood attempting to get home in two. He cut blocked the thing about 35 yards right. It hit the right side of the big trees just short of the green and kicked back and to the left. It ended up in the 50 yard fairway bunker that you see short right. Then he did one of the most amazing things I have ever seen. He took out an eight iron...opened it flat...and hit a 50 yard 8 iron blast to about 15 feet. He made an easy two putt, preserved his 25 shot lead, and moved onto 15 like what he just did was routine.
I, for one, didn't even know a 8-iron 50 yard blast was even in the realm of possible shots. Amazing!
Dan: to answer your question, I think #12 is just a great parkland par 4. There isn't one trick on the hole, "it is all right in front of you" and plays exceedingly tough despite the fact that there is not one bunker on the hole. Moreoever, depending upon where you hit your drive, you can be required to work the ball numerous ways to the green...left/right, high/low. Also, the green is an absolute blast to putt on. Any pin placement on the left side is just pure terror - both in the approach shot and on the green. (ironically enough, the pin was never put on the left side during the PGA).
I love the 16th hole too but I think that it doglegs about 10 yards too early. That's my only probem with it. In sum, 16 is great....but 12 is just better.