That was once with a disgusting servebot performance, out of 10 peak Djokovic would beat peak Federer 7-8 times on clay. Yes, he is that good there.Peak Fed wins on all surfaces.
Not peak Fed beat peak Joker (2011) on clay. Fed for sure wins on grass and fast hard court.
No, 2011 was a one time affair and 2012 WB Djokovic was not at his peak grass game.Peak to peak they played on clay in 2011 and grass in 2012. Fraud won both. So you got to give him that. On hardcourts Djoko owned him most of the times in his peak.