I have not expected the EU to dominate NA if I am going to be all honest. The teams have never faced each other, the game is still quite new, and it is the first LAN tournament, so this tournament is very random and the team with better individual performance probably going to take this tournament and it wouldn't surprise me if Sentinels take it.
However, as time will go, the EU will dominate and completely take over the scene, as they always did, due to our different approach to the games and structure of our teams, we will dominate strat-wise and teamwise the server till the point where individual skill will be nice to win couple rounds, but not the entire series.
Mark my words :]