cant see why it would increase performance at all. Smaller spark means potentially longer burn time, or, incomplete burn, and also means less energy req'ed to fire the plug. I dont see how either would increase performance.
With all the aftermarket ignition systems, the gap is increased to make the spark bigger, not the opposite.
IIRC, stock gap (for V6) is .043".
Keeping a low profile while having fun driving my 6.