Folks - don't take this too seriously - that wasn't the intention. As I said - I consider this to be an academic difference, but still good for discussion
The Model 12 is incredibly slick and is easily as quick as any -pump- today in my hands (and I have shot them all). Yes, this includes the Nova - which is the only thing even close.
With an equal number of shells through it the Nova might be just as fast. New vs New it'd probably also be a dead heat.
I've shot 5 - stand with both the Model 12 and an AL 391 and find I can acquire the 2nd bird just as fast with the pump, but on the -same- target (missed single) I am faster with the auto....
Again - academic but neat to see people's experiences. Safe shooting!