Above are the numbers from two years of driving. As I wrote the first time I posted my data, I enjoyed the power of the car in the beginning a bit more than I had in later months. If you look closely at the results of driving in the summer of 2016 and compare them to those of summer, 2015, you'll see a fairly big difference.
Many people on the Tesla forums have written that, based purely on physics, using more power to drive your car from a dead start will have no difference than taking it easy on the power as you start. Well, it sounds good from a physics textbook perspective, but from that one season, I can say that I don't believe it to be true. I spent most of the summer using quicker starts than I usually do to test it out. The more energy I used to get started, the higher the Wh/km usage; from that perspective alone, it was impossible to bring the Wh/km back down close to my former average of 191 Wh/km. In fact, my average went back up to the usage I had the year before, just from quicker starts. I will state here, if you want to use less energy, then go light on the go pedal at all stages of your driving. I learned during the gas crisis of the 1970s to drive as if there is an egg under your pedal. It worked then in an ICE (a car with an internal combustion engine), and it works now with an EV.
One more thing to mention since I last reported: I wrote that I would try out Range Mode (RM) for a season. I used it for a couple of weeks, then turned it off. I usually set my air conditioner around 27˚C for cool air when I need it. With RM on, I was having to turn the cooling down to 22-23˚C to get the same amount of cool air. Frankly, I don't see the point for RM in a RWD Tesla. I understand RM helps AWD Teslas with management of the front and rear wheel drives to save power, but I'll pass on using it with my current car.
I'll post the next numbers in a year. Since I have winter tires on now, I've added the tire information to the table above. I will say now, though, it looks like the 19" wheels and tires are going to have a beneficial effect on Wh/km usage.