Yes, in that a lot of players seem to be very mentally frail against Federer. Federer has won probably three matches this week when playing very crap by being much stronger mentally that his opposition.
BUT Roger had a pretty comfortable draw all things considered. If he got Berdych in the first round, in this type of form, he probably would have lost.
As someone said the best, the mentally strong, find a way to win. But if anyone studied the draw when it first came out you had Rafa, Roddick, Henman, Hewitt all on one side of the draw. The other side had Federer and Safin. Rafa drew Berdych in the first round. Fatigue cost him the match but it still went three sets and a rested Rafa would've won. Nothing against Federer, on his worst days he can outplay almost everyone, but he was given a cakewalk to the Final. Only Safin stood in his way.
I hope the US Open seeds more fairly and doesn't stack the deck against Rafa or anyone else for that matter. When you have cupcake draws the winner is always suspect.