I wouldn't call that a detune. 350W it's the Nominal power, it's not the peak power. It's actually a 100W bump from the nominal 250W. I'm sure the peak power will be just as high as previously rumored, which won't exceed 750 Watts. You're also right about not being able to ride uphill at those speeds. I've done a calculation last year and according to them, to overcome the gravitational force, drag, air resistance, and rolling resistance, and maintain 28 mph on a hard-packed 10-degree slope, the rider would need a staggering 3040 Watts of power - that’s over 4 horsepower.