It's so hard to tell at the moment. I think Italy have faced two really poor sides but it's probably a large amount to do with how well they've pressed and fought to win the ball back. If England played them I wouldn't be too concerned. They've got some excellent midfielders and a tough, experienced defence but Insigne, Immobile and Berardi wouldn't concern me at all.
Portugal won the last Euros having drawn all three group games and just managed to scrape through. It's a long tournament and the side playing the best football now doesn't necessarily win it.
I thought France were quite underwhelming but you could see how easily they can carve teams open when they do play. They're a huge threat as everyone knows. Germany through Kroos and Gundogan controlled the game, but just couldn't do anything in the final 3rd. They really should switch to a 4-3-3 as if they do they'll cause teams a lot of problems I think. Might lose something defensively as a result but at least they'll score some goals.