I hear you kinged, I live in La Jolla and have hardly ever used the heater. But in the few times I tried at night, it seems to take forever to get any heat and I have to set it to 78 or higher to feel any heat at all.
I emailed my service rep and got this response:
"With warming up the car in the morning, remember to keep in mind, the car is heating (and cooling) the battery pack constantly to make sure the pack stays within optimum range. The car will ALWAYS set the pack as a priority. So as you start the car it will warm (or cool) the pack first before the cabin. Also why in the summer you may notice the car takes a while to cool the cabin; again cooling the pack first is priority."
I question this and to me, it seems the thermostat isn't reading correctly. Even when set to 78, it barely seems like warm air is coming out.