I'm no expert on golf or course maintenance but from watching every minute of the TV coverage Thursday and Friday (OK, I fast-forward the interviews and canned fluff pieces) I'd say the conditions at ANGC those two days were pretty much perfect for hosting a major championship.
A shot from the right angle and landing in (exactly) the right spot could stop quickly even out of the "second cut", for instance Vijay's shot on seventeen yesterday, but land a few feet away and you're in trouble. On the fifteenth hole balls hit to the right spot but not perfectly struck would take a turbo-boost toward the pond on sixteen. Yet it was possible to land the ball softly on certain portions of that green from 200 yards if you could hit it high and spinning (Nicklaus-style). The twelfth, thirteenth and ninth (or was it the tenth with the front pin Friday) required control of spin and trajectory in order to avoid trouble, rewarding not just strategy and aim but ballstriking mastery.
Now for all I know it would have been "even better" with harder green surfaces but it's hard for me to imagine. It has been a hell of a toonamint so far. It's a dead giveaway when you can tell from the player's reaction while the ball's in the air when a shot is or isn't going to hold. I love seeing these guys having to control direction, distance, shape, trajectory and spin and then being consistently rewarded when they do and punished when they don't. I'd say ANGC in the first two rounds gets pretty close to that ideal. Much firmer and I'd think the "consistently rewarded when they do" might be in jeopardy. But I'm no expert.