The North Quad has been slowly rising. Now that the structure has taken its (apparent) final shape, I expect "filling in the gaps" (with exterior walls, interior walls, windows, etc.) will be pretty quick.
Lofts 411's central crane is being taken off in this photo. The exterior facade seems to be almost completed - just some "fillin in" along the central line of the building. Of course, now that the crane is off, all heavy lifting is being done from the street by a massive truck-crane, blocking another lane of traffic going down Washington... (Oh, well, such is the price of progress.)