Here are three (inexpert) observations about modes from my last track day:
1. "Dry" has quite a lot of intervention especially in controlling power down on exit. Big cut in power, you can actually hear it cut if you are too hard on the pedal.
2. "PTM 1" Much better as far as intervention in cutting power from engine but still noticeably less power. Braking very stable, no yaw noticed.
3. "PTM 2" Definitely more power especially with car straight. Can move the car with the throttle with fine adjustments at the pedal. This is what you expect with a torquey V-8. In a long steady state series of esses I could move the nose into the next corner more by moving the rear end out with slip angle at the rear. Definite yaw in braking, slight rear end sway under heavy braking. You need to manage braking but the car will "manage" throttle off in a corner within reason.
If you have been track driving for some time PTM 2 seems the best to me. I have not turned everything off, however. Maybe next time.
