I have had two test drives of Model S. The first was of the Sunset Red non-Performance car at the Fremont GET AMPED event on June 22. The second experience was driving a green Signature Performance car out of the Bellevue, WA store this past Wednesday, Oct. 31. I seemed to notice several changes in the driving dynamics experience between the two drives. It could all be subjective, but that is why I am asking the forum: The second Performance drive gave me a feeling of tighter suspension tuning-- a firmer, more planted ride. There was more feel of road defects, in both a good and less good way. In the first drive in June, the regen felt distinctly softer than the Roadster, even on the "Standard" setting (we tried both). Others seems to have posted that impression as well. Whereas on the second Performance drive, the regen deceleration indeed seemed similar to the Roadster, as I had been told it would be by Jerome Guillen, the Program Director. This time I noticed the actual power, and saw it hit at least 60 kW. That seems more in keeping with the energy recovery from a much heavier car. I TOTALLY loved the second drive, and am SO glad I upgraded from Sig to Sig Perf. One more thing: I was driving on wet pavement in drizzle in the second (Performance) drive, and was surprised to find that the traction control is less aggressive compared with the Roadster. I was able to break the rear wheels free a couple of times while accelerating through tight turns. It was easy to catch the slide, but I was (pleasantly) surprised that the Model S P85 is not so conservative in torque management. Comments?