I've seen Elway stink up the joint more than once, but I always believed that at any moment he could pull Excalibur, the Triforce, Fezzik, or a band of angry Ewoks out of his back pocket and win the game in a slanderous and irresponsible defiance of all logic, history, science, and reason.
I have never felt that way about Manning, I don't currently feel that way about Manning, and, short of him gaining superpowers after being bombarded with cosmic rays on a privately-funded and ill-advised space flight in the early 1960s (an ever-increasingly difficult stunt to pull off), I don't see myself ever feeling that way about him.