It depends on what measurements measure great. A speaker's SPL measurement can be within 1dB from 20Hz-20,000Hz and it can still sound bad. Why? Because its phase and time error might be off. Now if that same speaker measures great in SPL, phase, time, impulse, etc., you can be 100% certain that it will sound fantastic! Same with other electronics. You have to know what to measure, how to measure, and which measurements are important.
Just as an example for amplifiers: Most manufacturers always list the frequency and distortion, because these are two of the most simple goals to achieve and make look good under certain conditions. So just because they measure great, it doesn't mean that the amp sounds great. Now lets take a look at another parameter, the slew rate. Almost no one lists slew rates, because for most amplifiers they're not that good. A slew rate measurement can speak volumes! A high slew rate amplifier will also have a high frequency bandwith. With a high frequency bandwith it means that at least up to 20,000Hz the frequencies are extremely in phase and in time. It also means that the amp can pass through a square wave that actually looks like a square wave, etc. All of this makes for a wonderful amp and if manufacturers listed this parameter, consumers would be able to make a better decision on what to buy, or at least to go out and listen to.
So again, depends what measurements measure great.
