I've just been here for this drive, but so far I think that Quick looks good (but it seems he had some issues earlier especially with the fumble) and Pead looks like he's running well (even though he had the fumble) and isn't being indecisive in his runs.
Quick on those last three receptions (including the one that drew the PI) should help him get confident, all three were great plays. He didn't come in bounds on the TD reception, but he drew the PI and still held on.
On an unrelated note, I like how Holt claps after a good play, you can tell he's excited about the team and seeing them do well. I'm happy that he didn't essentially stop caring when he left, like I feel Warner has. Different terms of course, but sometimes I get the feeling that Warner doesn't really care much for St. Louis.