If Rochus was taller would he be more successful?

Well he certainly would have a much better serve, but other than that I think he has adapted his game well so that he can compete with the top players. He certainly has strong mental fortitude, great footwork and foot speed, versatility (both a forehand and a backhand slice, and a one handed backhand). Its pretty unusual to play someone with this type of game so he can certainly catch his opponents off guard. I agree that his height hinders him, especially when he is serving or at the net, but I think he has adapted his game well enough so that height is not really an issue. Certainly he has not had consistent results in the past but if he can prove himself and beat del Potro tomorow he can surely prove that even a man of his size can handle playing against taller players.