I am firmly of the Jimmy Hughes school of auditioning hi fi components. What this means is that I don't believe in "growing into" a sound, "getting used to" a sound, taking a month, week, day or even minute to "learn" a new hi fi system or component. No, I believe that something should sound good and "right"
from the first few seconds you hear it. I believe that if something does not sound good immediately, then it is not good. Furthermore, I believe that if you purchase a component having to "acclimatise" yourself to it, what this really means is that your brain has to recalibrate itself from a default setting to whatever you are listening to. And the more your brain has to work to reconcile the reproduced sound to what you hear at a live concert, then the more ill-matched the component is to your ideal one.
The Rhinelander is one of those components that just sounds "right" by the time the first bar of a symphony has been played.