[MetroMPG]

I'll go out on a limb and say that while the ability to upshift sooner while accelerating is good, it's going to have a very small impact on overall fuel consumption, simply because we spend so little time accelerating, vs. time spent cruising (assuming you're not pulsing & gliding).

So unless you're driving a garbage truck or mail delivery route, better gearing matched to the turbo's good low end torque is what will return the largest fuel economy improvement.