Plyos do not burn a lot of energy. If done right, they shouldn't even make you winded or fatigued. You do plyos to work speed, not endurance or strength. I'm thinking you guys have a different idea of what plyometrics really are.
Plyometrics are used for explosiveness. Not for raw strength or mass. Also, hard and heavy again isn't going to produce the most muscular physique. Again this is why olympic/professional athletes aren't nearly as massive as their bodybuilding brethren. To get large, you have to lift large volume. Yeah some methods may work better for you but its most likely due to a change in regimen, not that method actually producing more mass gains.
If you're going to refute, please cite some kind of evidence other than it worked for you or your buddy or whatever please.