There are so many variables as to what makes our systems sound "good".
For example, could it be that coming home from vacation, you had forgotten what your system sounded like, and that previously built-up brain sound memory was lost during your time away? Same could apply to this 48-hour waiting period.
It's like when you get a new component or some upgrade. At first, it sounds great but then you get used to the sound and it is hard to say you can hear the same improvement. Pull that new component out and then see what you think.
Have you listened to your system during the middle of the day and then late at night in the wee hours of the morning? I bet you would hear some difference when the ambient sounds of the day have subsided.
Just my thoughts.

