I agree with Al. The neck angle is set in relation to the bridge location. Then a saddle is fit and its height adjusted to yield suitable action. Actually, some manufacturers initially set the action high because it's pretty easy to lower it by removing material from the bottom of the saddle. Raising requires either shimming the saddle or, preferably, putting in a taller saddle. So, to avoid having to supply additional saddles, manufacturers (Martin is a good example) may ship their guitars with the action a bit high. But if you measured the height of every saddle above the surface of the bridge, I doubt there would be a consistent distance. And even if there were, it would be an artifact of a standard neck angle, standard bridge thickness, and standard saddle installation, rather than a targeted "spec" for the guitar. If each part were cut on a CNC machine and the neck angle was always set identically, this latter scenario might apply. But the resultant height would be more a side-effect than a target, if you get my drift. The critical variables, as already noted, are the string height above the frets and the break angle across the saddle.