It seems to me that all of these moves (top change, Jinx switch, Don Alan's switch, plus other moves like loading a Mullica wallet) all have a commonality:
1. Bring the hands together, each hand holding something(s). One of the items being held is there as a Macguffin (the big card, the bulk of the deck, etc.).
2. As the hands meet, misdirect.
3. While the hands are together, do something sneaky; i.e., something moves from one hand to the other (and/or from the other hand to the one).
4. Bring the hands apart, each still holding something, with no one any wiser.
While the "sneaky" move and what the hands are holding may be different with each move, there is still a consistency of choreography, psychology, demeanor, etc. that must be present for them all to be effective.
It is possible to get so worked up in the trees of crediting to miss the forest, and to me, the original creative thinker is the person who first started working this problem -- everyone else is standing on his shoulders.