Again, the warm-weather thing isn't entirely determinative of a QB's success; it's a factor, a deficiency that has to be overcome. Favre is a good example of someone who overcame his lack of a background in the cold. McMahon, IIRC, went to BYU, which is mighty cold in winter. But my point was, and is, that a QB who has already learned to play in lousy weather is better suited to the AFC East than someone who was born and raised in the sun. Before Edwards became a shellshocked Kenny O'Brien clone who struggled in all conditions, he was two different players depending on the weather conditions. Sanchez may be in the same boat. Is it possible he'll get over it? Sure. But it's a problem that the Jets need to address.
I thought Marino had a good career in Miami, FWIW.