I believe you'll find the dwell reduction actually happened with the conversion to 12 volts. The higher voltage allowed for better coil magnetic saturation and more "points open" time for point cooling. No sense going off on some theoretical flight of fantasy when there's a logical explanation for something.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!