The short answer is yes.
I’m just watching the movie realizing, “Hey, Optimus’ hands are totally taking up the engine compartment. What happens if someone peaks under the hood? Won’t they see these huge 8 foot robot claws?” Then I saw the “Inside the Allspark” DVD feature where they had a couple wireframe renders of Ironhide doing the “Quake Jump”. And his nearly already transformed legs are just hidden in the bed of the pickup!
I do find myself cheating design wise right now. There’s absolutely no practicality in splitting a door panel into thousands of pieces just so there’s an even distribution of color on the robot. That and, it looks weird to have the panel break up into all these little pieces and suddenly zoom to their proper place. So I find myself creating allready colored panels and simply making sure they aren’t visible in car mode.
EDIT: I rendered a turntable animation of these stills, and I slapped it on Youtube:
Click Here