Package also seems to include battery heating, probably wise as li-ion sucks in extreme cold: "The Cold Weather Package adds an upgraded heater for the battery coolant to boost range and performance in the coldest of weather, along with an "improved defrost" grille, heaters in the cowl and the windshield washer nozzles, and inside, heated seats for the second row as well."

You can do morning heating using grid power, trigger it remotely via your phone (they have an app for iphone/droid). I think you also can schedule heating ahead of time.