[Christ]

You're right, you shouldn't follow my example - I screwed up the math horrendously there.

Accelerating the weight is definitely a factor, and no matter what anyone says, I believe it takes more energy to accelerate more mass, and more mass doesn't give an equivalent extension on your glide. IOW - if you add mass to the extent that it takes 30% more energy to do the same acceleration, you should see a 30% longer coast on flat ground, in theory. I don't believe this is true in practice, though.

I, too, would like to see "real" numbers, rather than just postulations on the apparent upside of P&G.