Orson Scott Card spoke out against the whole thing, saying that "borrowing" ideas is how fiction gets written. In fact he feels like maybe he's been ripped off:
A young kid growing up in an oppressive family situation suddenly learns that he is one of a special class of children with special abilities, who are to be educated in a remote training facility where student life is dominated by an intense game played by teams flying in midair, at which this kid turns out to be exceptionally talented and a natural leader. He trains other kids in unauthorized extra sessions, which enrages his enemies, who attack him with the intention of killing him; but he is protected by his loyal, brilliant friends and gains strength from the love of some of his family members. He is given special guidance by an older man of legendary accomplishments who previously kept the enemy at bay. He goes on to become the crucial figure in a struggle against an unseen enemy who threatens the whole world.