my educated guess is that those walls will NOT be concrete. First of all they are not using plywood.....using instead the particle board sheathing. Wet concrete would not cure well with that type of plywood..it soaks up too much water. second..if it was forms...it wouldnt have the header on top of the doors. most concrete structures are made of concrete block, and filled in... i would've thought that the concrete block would've been used to protect against storms....not a wooden based structure...but it is SXM.