Haven't seen too many NA cars gaining the so call 15-30 rwhp that people are claiming. I'm sure it's better for the engine overall especially for boosted cars but as far as a performance gainer not so much. At least for the NA cars.
I agree. A stick car shocks the tires MUCH harder and does it several times going down the track. With a big power stick car, the car is much more unsettled going down the track making it more of a challenge to ET well. A well running auto car is nothing more than just point and shoot. Which is great for a track car taking a lot of driver error out of the equation.