Have not had my HVAC serviced since I think it's cooling the cabin down in a reasonable time. Just the first car I've had that directs cold air to the defroster vents first before the main vents.
After having been out all day in the Houston heat, the climate control continues to operate per my initial observation. With four people riding and both front and rear climate control on, It cools down quickly. I leave the mode on auto and the temp at 71, and the fan does adjust automatically, from 10, 7 and finally 5.