2006 Deville DTS- 291 HP???

I went to the chicago auto show this weekend and saw the new DTS. When I looked up the powertrain information at the computer next to the car, it said 291 HP. I think the torque was in the 280 range. Does anyone know what's going on? Why did cadillac reduce the power? Was it due to fuel economy or emission standards? This just does not make sense.