Shirvington had the race of his life when at 19 he finished 4th to Boldon, Fredericks and Obadele Thompson and he showed absolutely no fear then. Expectation, his own and public, murdered him. I watched him banging his head on the track in frustration at the Sydney Olympics when he felt he'd let the country down. That was the start of his desperate years I think. Sure, he did have TWO 4ths in world indoors (Maebashi and Lisbon) so his pedigree was built up from 1998 to perhaps 2001 ... and then expectations started sinking.
He started really fighting with his own running as he tried to break 10 seconds every time he ran. He became so rough after the first 60/70. Patrick Johnston often ran smoothly past him in the latter stages of a race even though he could never have Shirvo's start.
I'll give Kennedy time to prove his consistency and "stickability" in the sport