Considering the past few major champs fo for the USA winning 3 of the 4 relays is a pretty good performance. I am sure the team would have loved to win all of them but they will see that as a step forward. In terms of that record it should have been under 37s a long time ago. Especially when you cosider the number of nations that have run under 38s with no or only 1 sub 10 athletes in the team??? It will not be a surprise to see the Americans and Jamaicans take that time another 0.4-0.5s faster.