Atticfire is an architectural photography team working out of Savanna, Georgia that claims to shoot 8 spaces a day (5 shots above the industry standard). Remember, this is not real estate photography this is architectural photography where 3 spaces a day is the standard because of attention to detail and extensive lighting equipment. Still, it is interesting to look at their 5 folios of examples on their site that shows "before" and "after" shots. They say the difference between the before and after images is "styling, propping, lighting and extensive digital post-production".
I think it is interesting to look at these and try to figure out what they are doing different. My guess is that they are doing more of their lighting in the "travel light" Strobist mode similar to using multiple strobes and using some HDR processing in some cases. Their goal is to spend less time on site (similar to real estate photography requirements) even if it is at the expense of more post processing time.
Update: Thanks for Aaron for explaining the technique they are using: "These are composite images made from multiple exposures. One of the major advantages to this technique is that it saves massive amounts of set up time while on location. Instead of setting up dozens of individual lights, one can use just a couple (or one) and light a different part of the scene with each exposure and then blend all the exposures together."