DFKD ,sorry to tell you but the reason standard is better for racing is for power transfer but for high end race cars using an auto/high stall convertor with a large oversized turbo will blow the doors off a same model but with a 4 ro 5 speed tranny.No lag from driver inputs.
Also in newer Lexus using the PWR button makes the throttle response much sharper causing more thrust.
I can't drive my LS without it in power as i feel like i am waiting all the time.