At last- I am vindicated! Here's a clip featured on 60 minutes about a 12 y.o. composer/prodigy who creates his music, fully actualized, right in his head, without having advanced musical-playing technique.
His compositions become clear as he walks along, humming and moving to the the rhythm. This is EXACTLY how I compose as well!
Although, I won't claim to be a prodigy, it's reassuring to La Moi that my methodology has been validated. One shudders to imagine how many would-be composers who, although not nearly so gifted as "Blue Jay" have been ridiculed, or discouraged from following their muse, since this methodology it flies in the face of "standardized" formal musical training!