Think about it though. Petersen stays deep, plays angles, doesn't make poor decisions with the puck and generally leaves the defense to mop up around him.
With Quick you have a guy who challenges hard, makes unbelievably athletic last ditch saves, but isn't the most positionally sound and isn't the strongest puck handler. He is also more prone to redirection goals because his initial positioning on shots from distance is to drop low then rise up to the puck. Its why his saves often look more spectacular than most.
It is easier to play in front of a Petersen than a Quick, its more logical for a defender. You have to think well, quicker, with Quick in net because he does so many things that most goalies don't do. Defenders with limited experience or slow feet and/or reactions will always have it a little bit tougher because their comfort zones are a little smaller.
When you factor in MacDermid's um, modest skill set, he will perform better in an easier to read situation.
Plus lets not gloss this over, Quick has not played particularly well this year either.