Me too sort of (24 yrs). I use to agree, heard the term a few times over the last few years and wrote it off as imaginary/ marketing BS.
These statements lead me to assume.
Neither of you have played through piranha speakers?
I believe it's a big reason for their popularity with upright players.
Nope, never even heard of them, let alone played thru them - still sounds like BS to me, though...