I don't know, I wasn't born/know nothing really about it, but it seems like it. 4 slams in one year against those opponents seems pretty impressive.
Also, I always felt like Fed was at his peak in 05-06. Still can't believe Safin snagged that AO in '05.
LAVER, for sure. Not only did he win the Grand Slam, he did it against Much Tougher Competition than Roger had.
Djokovic- McEnroe said Nole's year was better than his in 84, so I take his word for it.
McEnroe 84- Also much tougher competiton than Fed 06, destroying Connors at Wimbledon. Connors had beat him in 5 the year before.