Reread what I wrote. YES, LP Standards are chambered to weight less.
The point being, heavier guitars are not necessarily better sounding guitars, evidenced by Gibson CS LP's that use BETTER tone wood, which is LIGHTER than a NON chambered LP. Meaning, the heavier NON chambered LP does not sound as good as the CS LP, both unchambered, full thickness. It's the wood quality, not the wood weight.