c) I didn't see this in the orginal thread, but in short duration anearobic efforts, are the leg muscles the limiting factor? Or are there other system biochemical and structural limitations, e.g. ATP synthesis and ability to hold onto the handlebars? My bet is that system factors are important here as well, as otherwise powerlifters would be winning sprint medals.
Strength is not a limiting factor. A sprinter puts out nearly 20% less power for 10sec than their peak power so they can always apply more force to the pedals. Sustained power whether it is 10sec over 200m or 200-250 watts over 21 days in the Tour is what matters. This is why second generation power meters offer nothing special for fitness measurement over standard power meters. The research on where the power is applied in the pedal stroke has been done and we know that a natural pedal stroke, the one a kid uses when they first learn to ride a bike, is optimal and trying to change it by using gimmicks has never been shown to improve fitness.