I find it weird that you guys are claiming those power and tq gains based on what other people have said. Seems like something you'd test yourself... I don't see how less rotational mass would give you more power anyway. Once rotational mass is spinning, the weight loses it's negative impact on the drivetrain because of its own inertia. A drive train cannot create HP, but it can let the HP and torque do its job easier.
It simply makes the car rev quicker, not produce more power.
Aside from that, what's the weight on this DS vs stock?
The weight difference is about 19lbs