Well, to be fair, I think it was a very physical puzzle. They all looked pretty pooped and I think that Rob used everything he had to win. He has a pretty big target on his back right now and I wouldn't be surprised to see him go soon.
Going back to my comment about Philip from before it appears I may have been right. Maybe he really is playing a game. I have a feeling that the "tribal speech" he referenced last night is exactly what I predicted (ie the only way I could get to the end was by acting crazy and making people think I was a good person to take to the end). This is a strategy that hasn't been used before and it may pay off for him. The only problem is that he may take it a little too far and end up being so annoying that he gets himself voted off. At this point, I hope he makes it to the end so I can see what he has to say to the jury.