With all of the software available these days, including REW, which is completely free (not counting the modest price of a compatible microphone), it's fairly easy to check any system's in-room performance. Frequency response, phase, RT60, etc are all available for the viewing.
For those unable or unwilling set up and run something like REW, the automated room EQ built into a lot of electronics these days will at least provide before and after frequency response plots. Most of those don't actually measure the results, but they typically provide fairly good approximations. As I expected, a few of the responses posted here indicate that there are members who adopt the "Father knows best" approach with respect to the results they've obtained, and that's fine. Similarly, I was not surprised to learn that there are some who have no idea what the objective in-room performance of their systems is.
I presumed, perhaps erroneously, that at least the majority of members here have generated some sort of response graph, and therefore know the in-room response of their systems. This is, after all, Audio SCIENCE Review, not Audiogon. Fortunately, most who responded to my poll had no difficulty understanding what I meant by "accurate." But, as always seems to be the case here, someone invariably jumps in to sidetrack the thread. Most unfortunate.