I agree that things haven't been that much different under Klinsmann, but there have been a couple games when you could see the US playing the style he preaches. I think the January friendly against Venezuela was a game example of this. The US pressed high and moved the ball quickly and cleanly that game, and I think was unlucky to only win 1-0.
The other game that comes to mind was the Brazil friendly in May (maybe the Scotland one too, but I didn't see that). I thought the US really took the game to Brazil in the 2nd, but Brazil's keeper was fantastic and Brazil burned the US on the break a couple times. I thought that game was really closer than 4-1.
I was thinking of the US as ideally becoming a poor man's Germany, playing the Klinsmann/Loew style. The US is, I think, finding a backline that is more athletic and more comfortable passing out of the back. Cameron, Johnson, Chandler (if he commits), Edu--all of these guys are comfortable on the ball (for defenders) and Johnson and Chandler can attack up the flanks--the poor's man Lahm.
I think the midfield is where the US is really lacking at the moment. They just don't have enough players who are good enough technically to keep possession under high pressure. Continuing the Germany analogy, Bradley is the poor man's Schweinsteiger, Jones is the poor man's Khedira, Donovan can be an effective flank player (like Mueller), but they don't have an Oezil to really give the attack any cutting edge, and they don't have another effective wide player. I think that's why Klinsmann keeps giving Shea chances.
OK, this ended up being way more long-winded than I intended.