While we're on Mortenson, why did he develop cold? Is there some advantage to doing stand development in the refrigerator? Does it delay the onset of fog? Is it possibly something only applicable to the very different films of his era?

I've found I actually prefer stand hot with films that can take it. I do my TMY pushes as 20-25 minutes stand in 1:1 Xtol at 90-95F, works great, a little fog but zero speed loss. Delta 3200, however, seems to lose speed into the fog at anything over 68F, even at 15 minutes.