All normal distributions follow a bell curve. That likely includes the LL's from that period. Some of those Loars may not be on the good side of the curve although I think LL's influence may have skewed that distribution a bit. Nonetheless, physics being what it is, you will have a distribution of sound quality. Did LL sign the "bad ones"? Ever see a 22-24 unsigned F-5?
The ones on the good side of that curve are unbelievable!
It still happens today too. Good F-5's and not such good F-5's. Hoss & Mega-Hoss. Normal distributions of product quality. Physics of materials.
I have a garden variety standard '03 Fern [formerly owned by John Rigsby]. That mandolin is so powerful [loud, clear, huge fat tone] it amazes me everytime I play it and it gets better every day. Mega-Hoss. It definitely fell on the good side of the bell curve!
10 Gibson MM
08 Weber Coyote
46, 53, 55, 58 D-28
45, 54, 55 D-18