In any case, the calorific value of food is very inaccurate as a measure of how a human body will use that input - would you really expect 1000 calories of raw broccoli (say) to have the same effect as 1000 calories of HFCS or refined sugar?
Yes.* Much like a tonne** of feathers is just as heavy as a tonne of lead. Next?
* Alright, not exactly; but the idea that you'd be able to eat 1000 calories of broccoli is entertaining. It will also contain a great deal of fibre and your gut bacteria will love you...
** I have no idea what the appropriate el reg unit is. Perhaps a Paris - 60kg of air(head)?