I like your avatar. I've never understood how elite sprinters do that. Fabio Cerutti ran a 10.4 in Beijing, although that's closer to his PR than Powell's 10.4. I would speculate that the track is slow and that the absense of an indoor season creates a farther deviation of times. He has broken 9.8 before, and the sub 9.8 club has a high rate of being caught for drug use, and a guarentee of using PEDs.