I thought Bolt was stretching it out too much tonight.
I was looking forward to seeing his form from the relay anchor last year, but he didn't show it. I thought the added musculature was geared toward effecting that new, better style.
I think he was trying a bit too hard to put up a good time. I wouldn't be surprised if he didn't lose too much weight, but became more crisp in his form, and used his core more.