http://www.pokemon.com/us/organized-play/championship-series/2011-world-championships/faq/
Prizes are awarded to the top 32 players in each age division.
The divisions are:
Junior Division: Born in 2000 or later
Senior Division: Born in 1996, 1997, 1998, or 1999
Masters Division: Born in 1995 or earlier
Prizes are awarded to the top 32 players in each age division.
The divisions are:
Junior Division: Born in 2000 or later
Senior Division: Born in 1996, 1997, 1998, or 1999
Masters Division: Born in 1995 or earlier