Dempsey's a great player, he's just out of his element when he's asked to play alone up top. I agree we haven't had an elite scorer in...ever... but that's not our only issue. We just can't control the ball for extended periods of time. We were outplayed by 3 out of the 4 teams we played, we were just lucky enough to capitalize on a couple good strikes on the one team we beat (Ghana). You can beat some teams by playing soft and then catching them on the counter-attack, but it's not a recipe for extended success.
We're still a long ways away from being a contender, despite the heart and passion.