Does your case muffle or in any way reduce the loudness and/or quality of the internal speaker? Since there are no dedicated holes on the touch to allow sound to come through, it must come either through the dock connector, or just reverberate through the backing. If the speaker works in the latter fashion, I think that a silicone skin or BodyGuardz/InvisibleShield type case would prevent vibration and muffle the speaker. And a leather/hard case would do the same, because there would be more material blocking the sound. Has anyone experienced this, or is it a superfluous worry?