I think you are probably correct about the physical adjustment period, and I would add the disclaimer that I feel I will always play better on my own setup. However, when I say "holistic" I'm trying to imply a sense of the big picture from a sense of small details: on the DB, I think we are always getting to somewhere from somewhere (especially as improvisers, which many of us are). With this being the case, once the body feels how far it is to play, say, a whole step on the same string or a perfect fifth on adjacent strings, it creates an internal compass or mapping sense of how far it will be to other intervals all over the instrument, and adjusts accordingly. Obviously this sense becomes better and more exact with time and practice, but I think being open to this bigger picture of muscle memory/awareness is an important part of playing the bass at all times, and certainly of switching between different instruments. Again and always, YMMV.