Murray has definitely showed he's good enough to beat a decent Federer in Masters and lesser tournaments, but when it comes to the biggest stuff, he's got 3 wins, 2 of them when Fed was clearly struggling and even then it was fairly close (WTF 08, AO 13). Olympics 12 is the exception, because even though Federer was obviously tired, Murray pummeled him there alright, which makes me think that he could have honestly beaten Rogr even without the Delpo curse. Olympics was probably Murray's best ever tournament - beat Djokovic and Federer back-to-back in straight break sets without conceding serve once, very impressive!