With greater quality and accuracy, yes, but not far less time. 40 large mold sets would take quite some time to produce and be massively more expensive. Once the molds are made, they would be faster, but the break even point in time would probably be a couple to a dozen cars, the break even point on cost would probably be in the thousands.
Most cars would be sold in the thousands and besides, nobody would buy a car if the finish was as bad as this. They only achieved the speed at all by rushing the printing, extruding from a wide nozzle. If they were to use high precision nozzles to achieve makerbot quality finish it'd take 100x the time and it still wouldn't look great. It's just not practical except for the crudest of prototypes.