I remember watching Jimmy Connors in his last US Open. He went for the towel after every point. It was an evening match and as I recall it went well past midnight. It was the slowest tennis I have ever seen.
Djokovic doesn't help any either, they both stall forever. My bananas will be ripe before the second set is over. That was one of the best things with that epic Federer/Roddick Wimbledon final, they both just got at it as far as pace of the game.