An interesting angle to take with Ted is the Inverted "U" theory of human performance. It postulates that performance increases with intensity to a certain point, at which increases in intensity actually diminish performance...basically an athlete or performer starts to go on "tilt". But the curve slides along the x-axis, performance, depending on the individual and their mindset.
Ted was intense, but he was also a cocky MF'er with no shortage in the confidence department. There's an argument that guys like him, Manny, Barry Bonds, Ricky Henderson, Wilt Chamberlain, Larry Bird, Neon Deion, and Ali were the greatest because their mental opinions of themselves never limited their physical abilities.