Depends what they mean as better. He'll have more skills, knowledge, experience & tactics now than he had back then, it's just that his body lets him down more often than it would have in the past.
Fed in 2006 for instance played 97 matches, back in the days of 5 set masters finals, and still managed to win 12 tournaments throughout the year. Last year Fed played 83 matches, his highest since 2006, and looked completely gassed post-Cincinnati.
"You used to be able to disagree with people and still be friends." - Clint Eastwood