Strange, right? If your definition was clear and objective, I wonder why I found it just a bunch of meaningless words.
"nothing but clarity up top" - So clarity in the treble... how does this help define what grain is?
"overall timbre finesse" - meaningless jargon.
"nothing to do with frequency response, its the driver quality itself" - ??
My point.
Lack of esoteric hearing and understanding,you know what....ignore me.
I'll resort to your "I hear X".