You make a great point, the Ravens with the most elusive QB in the game still lost.
Foles may be slow but he has pretty good pocket awareness and knows how to slide up in the pocket and has enough height that he can throw over the heads of his lineman.
Look I'm not saying that Foles is going to win us a SB, but I honestly think that we can see improvements from the QB, because Foles might just be better than Trubisky at everything BUT speed.