That is why it is so critical to not give up early goals.
The Czechs got an early goal against the US, then gave up an early goal against Ghana. It changes the whole dynamics of the game. The US just missed equalizing the match, just before the Czechs went up 2-0. One bounce, one glance off the wood work makes all the difference.
But still you can´t compare it. It´s impossible to score more than 100 in a NFL game, but you can reach a 7:0 or a 9:1. The US could do better, and they´ve shown that they´re better than that. You were in the quarter finals last time.