Actually, let's expand on this Stafford vs. Rodgers comparison. Here are the stats from all 4 players.
Stafford: 435/727 (59.8%), 4967 yards (6.8 YPA), 20 TDs, 17 INTs, 79.8 rating, 5.81 ANY/A
Luck: 339/627 (54.1%), 4374 yards (7.0 YPA), 23 TDs, 18 INTs, 76.5 rating, 5.66 ANY/A
Rodgers: 371/552 (67.2%), 4295 yards (7.8 YPA), 39 TDs, 8 INTs, 108.0 rating, 7.33 ANY/A
Griffin: 258/393 (65.6%), 3200 yards (8.1 YPA), 20 TDs, 5 INTs, 102.4 rating, 7.47 ANY/A (15 games)
Factor in rushing yardage, and Stafford got about 500 more yards than Rodgers. Factor in rushing yardage, and Luck got about 600 more yards than Griffin (in 1 more game). Rodgers, on the other hand, had 8% better comp%, 1 more YPA, a 5:1 TD:INT ratio (vs. Stafford's almost even one), 28 point higher QB rating, and 1.5 better ANY/A. Griffin, on the other hand, had 11% better comp%, 1 more YPA, a 4:1 TD:INT ratio (vs. Luck's almost even one), 26 point higher QB rating, and 1.8 better ANY/A. And, it should be noted, that Griffin had easily the worst receivers of the four.
Andrew Luck was the Mathew Stafford of rookies. Robert Griffin was the Aaron Rodgers. Given that both teams made the playoffs, I don't see how anyone could possibly give the award to Luck.