I saw this as well, he really pushed the staggered studs.

The drywall he used was along the same principal but a specific brand that cost 10X the price of regular drywall. It basically was 2 pieces of drywall laminated together with the green glue/caulking stuff.

An interesting thing he mentioned a few times was when nailing in to it to not take the nails out but rather push them in to keep the seal.

Holmes on Holmes Episode

Drywall Installer Used & Product Link

High Gloss Cherry
M60 VP150 QS8
Open for Auditions but please don't drool on the High Gloss