Let's use my Audi as an example, it comes in at 300HP and 310TQ with a 6 speed. I have to be at a 100% full stop for it to use 1st again. It will also be in 6th by 40-45mph. Fuel mileage is well above advertised and yes.. the car is much faster based on always being in the power band.
I always felt that the SC 3800 had the torque to drop at least a 5th gear on for even better highway mileage.