It's not about bad or good. There
is a science of how sensitive we are to distortion (for instance), it can be measured, and the answer is not very sensitive at all.
Here is a test:
www.klippel.de
It follows good scientific principles.
Maybe we need to start having golden-ear competitions at ASR; find who can score the highest (or lowest) on audibility tests. The winner gets to make any claim about audibility they want since they would clearly have the best hearing, and therefore the most relevant observation.