Bolt has what they call in athletics 'strong stride length'. That is,he is tall and not clumsy. Chances are,he is not under any influence. Indeed,if you look closely,he looks like not running too seriously. He is not a laboratory sprinter like the pumped up Americans.
We havent heard the last of him. My predictions:
During next championships,Bolt shall be doing a sub-9 secs in 100m.
And sub 19 secs in 200m
By 2014,he will either be banned from competing (he is killing the sprints) or another Jamaican/ Kenyan (Njung'e,perhaps) /Nigerian will floor him.
If it looks clean,it keeps your pockets clean. I mean,look at the soil...