2013 Results (spoilers)
Loved the movie and thought I'd do a little research after watching it. The movie covers the 2012 tournament. The 2013 tournament has already taken place and here are the results for the 8 kids in the movie:
Allan Kournikova - Repeated as Boys 8 champion (his third in a row).
Alexa Pano - Champion in Girls 8. Her third straight championship.
Amari Avery - Did not compete. Don't know why.
Augustin Valery - Tied for 65th in Boys 9.
Zamokuhle Nxasana - Tied for 8th in Boys 9. He continues to improve!
Jed Dy - Champion in Boys 9!! I was so pumped to see this!
Yang Kuang - Tied for 10th in Boys 8.
Sky Sudberry - Tied for 2nd in Girls 9, a stroke behind the champion.
Source: http://www.uskidsgolf.com/tournaments/world-championship/results?date[value][year]=2013&tournament_id=285105