I wrote up a quick post right after the game before there were any articles written
here (with a couple nice pictures), but I agree with you, Federer is showing his age just a little, and with the competition out there, that's enough to possibly keep him from future finals (although I hope that's not true). If Nadal stays healthy, he'll catch up with Federer or certainly come close I think. Brilliant players, the both of them, and I absolutely love when they play one another ...
Nadal’s physical and power style of play is not condusive to the long term. Federer’s efficiency of movement and style should outperform Nadal in the long run.
Congrats to Nadal. He is awesome.