I'm not going to claim that JP's first four games shouldn't count, they should. However, if you look at JP's games since he's come back from being benched his numbers don't look so bad for a young QB.
58/107 (54%) 726 6td 4int for a QB rating of 78.6
Those numbers aren't world beaters, but given the state of this Oline they're not bad for a guy with half a season's worth of starts under his belt.