The read was good and his in-depth testing...but it's not like he came to any specific conclusions about how to record great tone.
I think what often happens is people over-think and over-complicate the whole thing.
They got mics all over the place....they got rulers out and their measuring shit....and they get caught up in some pseudo-science, basically looking for a math solution to something that is purely about subjective tone tastes and needs...
...when you usually just need to move the mic around and find the best tone YOU like for a given amp/cab/speaker/song.
Sometimes a 1/4" left/right, up/down or front/back...and it's either great or sounds like ass.