This is not responsive to my question. The primary differences between Production and Single Stack are the minor holster rule difference for men, the reload "target" being smaller, and the single action trigger. If we are going to allow single action guns in Production, why bother with Single Stack at all?
This year more than ever since I've been shooting this sport (12+ years now), people have really lost sight of what the purpose of creating different competitive divisions was for. The purpose of divisions isn't to create a safe space for everyone to play. The purpose was to create a rigid, slowly (if ever) changing set of equipment rules so that equipment would be broken down by division and skills by class. Anything that doesn't fit the divisions we have goes to Open (within reason).
If you want to shoot your single action CZ, we have no less than three divisions where it's legal (Open, Limited, and L10). Why would we change the production rules to include a gun that was specifically excluded by the existing rules, when that gun has three other places to play?
Since when did every gun have to have a place where it "best fit" the rules?
In 2008, I shot Limited with my M&P 9 Pro because it was not yet on the Production list. It was identical in virtually every way to approved guns, minus 3/4" of barrel. You would be hard pressed to find me posting on here to change the production rules regarding the list and the number that had to be made before it was approved. Today, 8 years later, the M&P 9 Pro is among the top three most popular plastic guns in Production. And every gun made by a major manufacturer that otherwise fits the production rules will be on the list soon enough. There was no need for a rule change.
To answer your original question, yes, a non-hinged, 1/8" travel, light, single action trigger is a substantial advantage. You'd be hard pressed to find any human being--even Bob Vogel--who couldn't shoot a SA gun faster and more accurately than any (production-legal) striker fired one. That doesn't mean that it's a huge advantage, but it's certainly one that you could empirically verify with a timer and a shooter. That's why SA guns are not allowed in Production. It's also why certain trigger modifications are banned in Production (moving the pivot point). Yes it's an advantage. SA makes everyone into a rock star.