The US vs Jamaica comments should stop period. He should not be bragging even though he is the best sprinter right now and we should not be bragging on US domination of track and field for the simple fact that compared to the Caribbean the United States has at least 3 things the Caribbean does not have
1) A bigger population pool from which to get potential athletes
2) A tradition and system to find and groom potential athletes from high school and before
3) More resources period in the form of facilities, equipment and sporting professionals etc.
Yet every Olympics sprinters come out of the West Indies.
And just as a side note, Usain Bolt is not the only sprinter from the West indies to win gold in the 100 meters.