^^^that’s definitely true for squeezing every last hundredth out of the car
Let’s assume that there’s the best a car can do…and the worst a car can do (at a given weight, power level, etc.) leaves a gap or range of variance of X.
It’s my opinion and experience that launching correctly and shifting well are a HUGE part of X, and that is taken care of with DSG cars, especially those with launch control (we’ve seen some of the 2010 DSG guys fuck up the launch).
Take a car, and have everything perfectly prepared for, and a driver who is awesome. Say it runs 11.5 @ 120 MPH with a 1.70 sixty foot time. OK?
Give me a car with a driver who is awesome at setting tire pressure and driving straight, staging shallow, etc…but he can’t launch (bogs like crazy and cuts a 2.2 60’) and has two fists made of ham and takes 0.8 seconds per shift instead of 0.2 (like DSG or a fast shifter would). He’s fucked. He could easily run 12.20 @ 118.5.
Then give me a car with a driver who is shit at adjusting tire pressure (me…I never do), and deep stages (costs him a tenth or so), and weaves a little during the run (costs him some other small amount) but he can bang the fuck out of gears and launch it great, and guess what…he’s going to probably run 11.7 @ 120. The DSG gets you that perfect launch and great shifts.
That’s what I was saying above.