There's a whole generation of kids growing up now playing soccer. Many kids who couldn't compete in baseball or football.
I know I've got 3, my 10 yr old has been playing 7 years, my 6 y.o. and 4 (5 in 2 weeks ;-) )y.o. have been dribbling the ball since they could toddle.
The US is just a generation or so behind. We're getting there. If nothing else, Americans are competitive, and do like to win ;-)