I do think part of the "shock" of hearing electrostatics like the Quads comes from the utterly boxless quality of the sound. It does help electrostatics sound very detailed, but I do think that even the perception of transparency detail is somewhat still tied to that boxless quality.
I had been auditioning a number of very resolving dynamic speakers and recently listened to my friend's Martin Logan eletrostatics. That sense of transparency was great, but I also noted that a number of dynamic speakers seemed at least as revealing of information if not more.