Hi Dave!
Honey has been used for cuttings of different plants as a propagation technique, probably longer than we know.
It is used, as opposed to, a rooting gel or compound.
If nothing else it is inert in it's reaction to plant life, and holds moisture and protection to allow for root growth/nubs.
I have tried this years ago when I read it, and it does work, although I never trialed comparisons to determine a relative positive influence to rooting. Without an obvious negative affect it would seem history has proven out honey as an alternate rooting method.
Mike