Ahh, of course he did have a bit of luck. Like Agassi had against Medvedev at RG for example, like Sampras had many times... I think you are just trying to "find something" on Federer.
No I'm no trying to find something on him nobody is disputing his greatness, it's just that Sampras and Agassi were lucky in some important games and then unlucky in other important games.
Federer has had some massive luck on his side this year, especially in the Wimbledon final.