I see no one has replied - yet. I'll start it off by saying I did not vote - I don't know exactly what you mean.
I've been playing soprano for so long that I don't think about what I'm doing, really. I just do it. I suppose that subconsciously I make embouchure adjustments (mostly throat openings - and closing) as I play low or high.
And, I've said many times that I purposefully avoid playing high because I much prefer the horn in its range from Bb1 to C3 (and since I don't use written music, I can do pretty much what I want to do on soprano - or alto and clarinet).
This is not to say that I can't play up in the palm keys - and after having owned many sopranos over time, I know that some horns speak those notes much more easily than do other horns, even among those of the same brand/model. If I come across a soprano that does not speak those notes well, I move on, even though it really doesn't matter much to me whether the horn does or doesn't do those notes. I only care because I like my instruments to have the potential.
I don't recall ever testing the pitch of my mouthpieces off the horn. DAVE