Why is soccer so popular with U.S. tweens&teens, but not as a college/pro sport?

Where?

Where in any of these articles is the claim that soccer will become the biggest sport in the country?

All of these posts mention soccer’s pending popularity spike (or a claim thereof):

http://boards.straightdope.com/sdmb/showpost.php?p=10215725&postcount=28

http://boards.straightdope.com/sdmb/showpost.php?p=10215897&postcount=30

http://boards.straightdope.com/sdmb/showpost.php?p=10222710&postcount=70

http://boards.straightdope.com/sdmb/showpost.php?p=10225873&postcount=85

http://boards.straightdope.com/sdmb/showpost.php?p=12578117&postcount=94

http://boards.straightdope.com/sdmb/showpost.php?p=12578117&postcount=95

Most of them are one page. If you can’t be bothered to read something that short and would rather play gotcha, I can’t help you.

A bit late on this response, but not in the US they don’t.

Of the US starting 11: Onyewu, Demerit, Bocanegra, Dempsey, Edu (I think he’ll start, but Clark too), and Findley played in college.