Unless one took steps to alter the zone joint setup after running an auto-conversion, that data would end up in the pose.  Unaltered, it would clearly show the starting point.  If one is going to bother to manually alter all of the joint zones, one might as well go ahead and set them up from scratch (or from whatever starting point the Setup Room or a .phi conversion might give you), IMO.

Not an answer?  Ehh? 

I don't think Daz could ever, absolutely be able to identify the starting point in every single case.  Steps could be taken to try to make such identification difficult.  But embedded zone data in the pose is a way that Daz could identify the starting point under certain conditions.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.