A little sleep, and my head is clear, so...let's continue.
Your Glock...and any locked breech pistol that operates with the tilting barrel...is subject to the very same tolerance stacking in the aggregate vertical dimensions.
Because they operate exactly the same way for exactly the same reasons.
There are just differences in how the barrel disengages from the slide. Two methods/mechanisms for accomplishing the same thing. One car is started by turning a key and the other by pushing a button. The end result is the same.
And...a small point, but a point nonetheless...
The term "lockup" is usually misunderstood and misused, but its misuse is so prevalent that I've almost stopped bringing it up. When they say it, I know what they mean...even though it's incorrect.
The barrel engages with the slide vertically, but locks horizontally when the gun fires with the lug(s) in opposition under high shearing forces. These same opposing forces place tensile stresses on a revolver's frame and lead to the frame stretching that creates the back and forth play in the cylinder that we call endshake.
When you can wrap your head around all this. you're on the path to understanding how the pistol functions and how silly these Glock vs 1911 arguments really are.