I'm not sure which is more important but I attend a lot of live music events and have always found that the music quality as well as even speech intelligibility from sound systems, especially in many reverberant venues, improves in, say, the first 20 minutes of a concert. I've attributed it to my "learning" the acoustics so that I can process the sound better. A similar process may well happen with loudspeakers in a reverberant domestic room - after all most domestic listening rooms are quite reverberant unless heavily treated with sound absorption. In fact, professional acousticians (like me) often refer to them as semi-reverberant rooms. Most laymen are unaware of just how reverberant their and other's listening rooms are because they are so used to experiencing the reverberation, but it has to have an important effect on sound quality, if in different ways and degree than that compared to a concert hall or auditorium.
