I've watched all the games so far (except for COL-GRE), and I have to say, only 3 teams have impressed me:
Holland (they looked better than 4 years ago)
Chile (offensive powerhouse)
Mexico (impressed with their overall discipline and excellent teamwork)
What about the others? Italy, should be happy they came away with a win against England but they didn't look dominant; Brazil, looked like their defence was extremely suspect; France, they looked good but they played 11 against 10 for an entire half; Costa Rica, great upset but they still will have to battle to get out of their group.
I did not see Columbia play.
Only Holland and Chile really looked dominant. But I guess we're still in the early stages of the tournament.