Luck threw for more yards than any rookie in the history of football. He led the league in game winning drives. The only three QBs with more completions of 25+ yards were Brees, Flacco and Manning. He dragged maybe the worst playoff team ever into the playoffs.
RGIII deserved this award just as much, he had the best numbers. He just needs to stay healthy. But I'd still take Luck over Griffin and the midget. If you gave Luck the Seahawks defense and Marshawn Lynch he might still be playing.