Question, does this affect how the 'mix' itself sounds in the final product, - when master volume is less during mixing:

Dolby Digital soundtracks playback several decibals lower than the master volume level due to Dolby’s Dialog Normalization. Therefore, DD is quieter than DTS and the master. So, technically one should be complaining about incorrect master volume level playback on Dolby Digital soundtracks

..or is it just a question of a DD track (if volume is left untouched on your system during playback) being a few dB less than its DTS counterpart?