Guys, this is quite a big difference in performance. A small gain in traction is a large gain in actual performance as far as this game goes. My Massacro was sitting at a time of 55.5 on Cutting Coroners, and it's now at a time of 54.2. My Feltzer was a time of 55.9 before, and it's now at a time of 54.7. My Elegy was a time of 54.9, and is now at a time of 54.2. All of those times have room to gain as well, especially the Elegy time. The Comet, Carbonizzare have also been tested and seen comparable improvements, and the Carbonizzare is now finally a car that isn't worthless on the track, it can be managed much easier than before.
I expect to see an average of about 1.2 seconds taken off my times for the super cars as well. Prior to this update, I've tested spoilers and different wheel classes (including offroad tires on pavement tracks) and stock vs. custom tires and things like carbon pieces and armor, and saw no prior increase or decrease in performance for any of those items. Now we can say spoilers do add a noticeable and considerable increase in performance. 1+ second is big.