Nobody seems to know how the Medal of Hono(u)r rumo(u)r got started, but in fact Kelly received the Distinguished Service Cross vice DFC. The US awards system is typically mismanaged even more than most countries', as several MoHs later were presented for exactly what Kelly did. I believe that if the event had occurred later in the war, MacArthur's
PR shop would've ginned up the MoH, but he was losing big-time in December 41 and had other concerns.