Good post, @Gun Mutt.
Odd thing for me, with medium hands, (I can count the number of times I've needed large gloves on one hand...pun sorta intended), is that from the first time I went to the range with the G26 to qualify alongside my G19 in 1995 or 1996 up until present day...my scores are invariably within a point or two of each other...whether with an OEM 10 round mag or a +2. Seems to not make a difference whether I have two fingers or three fingers on the grip.
So there's more than hand size to the equation, obviously.
I do work on my hand strength, and also deadlift regularly, though I'm far from setting any kind of performance records.
It's the little gun that can. I really can't think of anything it can't reasonably accomplish. (Other than pocket carry...for me.)