Commander Kinsey wrote

I was astonished to find Americans actually call plasterboard
"drywall" even if it's on a ceiling! So not a wall!

I'm not astonished or amazed that you are astonished at that,
you have always been that mindlessly obsessive about words.

Daft in the first place to say "drywall", as all walls are
dry, unless made of mud, which is still dry once it's set.

Plastered walls are wet when you are doing the plastering, stupid.