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A taller person may required more setback than a shorter person, I would says it's about the same, the exception is that some smaller frame have a very steep seat tube, that even if you set it back right at the end of the rail, it may still not be enough.
The best solution I've found is the Velo Orange setback seatpost, due to the short clamp, allow a massive 40mm setback, the other is simply a saddle with a longer rail, that may not be an option as saddle are extremely personal and not everyone would like to tinker with it.
Nah. @apc, when you move your saddle back make sure you also move it down to compensate otherwise you'll end up sliding forward.