Having used double triggers for over 50 years of shotgunning, long ago I found front to back sequence really fast, normally way faster than I could generally recover from recoil (save for really light loads or wounded rising birds). Back to front is usually fast enough that it does not slow me down (recoil does, again, save for really light loads).
Sole SST I ever used for hunting was Browning Citori with selector combined with safety. After a few hunts with that gun, I found myself shifting selector in anticipation of shots on waterfowl, just like I shift between front and back triggers. After a while, I even found myself doing same with selector on flushes, even on birds not pointed by dog(s).
As other posters note, SSTs really shine when wearing heavy gloves. Next best are larger trigger guards and often even wider trigger spacing on scandinavian doubles -- thanks to common usage with gloves. Southern European doubles often seem to be made for folks with slender, damsel-like fingers.
Niklas
