I'm in the back and forth camp myself. I'll go through a 50's profile phase and then a 60's slim phase for awhile. I play and love both. Hell I could probably be satisfied with a Wizard neck profile and be fine.
Wide and thin. I've got an LP with a 1 3/4" nut width (they have that nut size available for Floyd Rose locking nuts, but that's another story) and the neck is 17mm thick at the first fret, 20.5mm thick at the 12th fret. A little bit of a D shape. Perfect.Do you like 60's slim or 50's fat or something else.
Spot on.Fuck spec sheets if it's still done by hands and eye balls. I've got a 50's standard and they clearly sanded off a ton of wood to make it so light, that includes on the neck. The neck is slim, and pretty fast. And I'm sure there's a "60's" standard out there, with a swollen ass neck. I've never gotten the hang up about necks. They all just feel like guitar necks to me and can adjust after 5-10 minutes of playing.