Guys, the numbers for Usain Bolt are incredibly inaccurate.
If Maurice Greene, former world record holder in the 100 at 9.79 ran a 4.21 (which he did, it is in his autobiography) wouldn't it stand to reason that the guy that beat his PR by over .2 seconds in 100m would at least run the same time as him in the 40?
Use commons sense, no way Bolt is as slow as the numbers said in this post.
For Christ sake, I ran a 4.45 electronic, and my PR in the 100 was 10.7 electronic when I ran in college. Bolt a full 1.12 seconds faster than me in the 100m so it only stands to reason he would be remarkably faster in the 40, right?
Also keep in mind that these are electronic times and Ahman's time was hand-held. Electronic timing adds .15-.19 seconds onto your time for human reaction time, I forget the actual conversion that is used but they have a set number for track records.
edit: spelling