I agree. The notion of speakers designed for HT or music is ridiculous.
Well heck. Now I'm forced to argue devil's advocate.
Some traits of HT-specific speakers that don't apply to [most] Music speakers.
1) Designed to operated backed against or in a wall. (and, for that matter, behind a screen
2) Angled options for mounting high on walls.
3) Small size to allow better placement with screens / subwoofers.
4) Wider dispersions (generally more audience members).
5) High efficiency
6) SPL > agility (we tolerate a bit more sloppiness in the ring of a triangle if the explosion is *loud*)
7) A bit more tolerant of a high crossover point to the sub.
Indeed: think, despite measurements to the contrary from Klipsch, that my KL-650-THX is somewhat subdued in the "ringing" section of the audio spectrum. Up-side? I can push the dialog louder before it becomes painful.