Much of the time, the play it for awhile scenario is true. But, I did have a "jump right out at you" experience a number of times due to a mismatched piece of equipment in the chain. One example, was when I was using a 6550 based integrated amp with my Horning Hybrid speakers. The Hornings had been a big jump for me in cost when I got them and the overall sound of my system did improve. I remember, trying a variety of tweaks, but really couldn't really hear much of a difference, or perhaps my brain was trying to "invent" a noticeable difference. I mentioned this to my dealer, who told me that it was my amp. What to believe, right? And, acknowledging that he's probably right, because of his track record, this would mean another long term savings towards another replacement component. When I did get around to replacing my 6550 with a couple of 300b mono blocks, the change in sound was immediate, and did jump out at me. Now, I hear anything I change in my system. So, that's what I did.
Kenny