I’ve heard the transient response argument before but I don’t see evidence that it makes the NS10 more useful. People love to look at graphs and jump on whatever makes a particular, popular product unique and use it as an explanation for its popularity. However, the transient response you actually hear will have contributions from room reflections. Any analysis of transient response that considers the speaker itself, but not the whole acoustic system, and doesn’t touch on the sensitivity of the human ear to transient response, is incomplete.