Transient response has been written about in audio journals for the past 50 years. And it is not my experience that it is a synonym for low distortion. Could you elucidate on that, because I must be misunderstanding you.
I can understand that something with more distortion might blunt the transient response, but a lack of distortion does. not automatically mean that a speaker will have excellent transient response.
And I assure you, a Magnepan, either a .7 or a 1.7 or ANY Magnepan (and these models are far under $10k) don’t have an iota of distortion in the bass.
Now if you’re speaking of the different materials designers use that cause a speaker to sound less coherent, I can follow that. Jon Dahlquist said - 50 years ago - that if a speaker had the same materials top to bottom, it would sound more coherent, but if the speaker had a cone made of one material, a midrange made of another and a tweeter of another, the speaker would sound less coherent. He did not say that it would cause the speaker to sound slow, just that it would not sound as though the speakers was "cut from the same cloth."
It would be nice if older issues of The Absolute Sound were available, because that was how many of us (much) older music lovers (not just audiophiles) learned how to listen - and evaluate - components. People seem unaware that the High End community is older than they are, and that concepts such as transient response are so old, we barely discuss it any more.
and for Larry5729, think of transient response as this: when you hear a sound, what tells you that it is a door slamming and not a firework going off? The transient response (also call "the leading edge") is the first sound coming off whatever is banged, or struck. You wouldn't mistake a door slamming for a firework, and the reason is that your brain sorts out - in a microsecond - the type of sound and then identifies it. That is due to the transient, without which, again, a piano would sound like an accordion.