Listening to the matinee from site link. My BDA-1 indicates that the signal is 44.1/16 bit cd quality.
Typically, Dolby Digital in the low resolution bitrate found on most dvd's whether 2.0 or 2.1, even at 48k sampling rate, is worse than cd. At a higher bitrate, then it can surpass cd. A good example of this is the Pulse dvd by Pink Floyd. At the low bitrate the cd sounds better, which I also own, the higher bitrate IIRC 654 bits, out does the cd. This is upsampled through the BDA-1.
DTS of equivalent bitrate or higher usually sounds better than Dolby or cd. However re-mastered cd can sound pretty darn good. Now DTS if it were not compressed would most likely be the best of all formats. But the industry won't allow that because that would be like giving the consumer the Master tape.
The best multi-channel format from the consumer's point of view is sacd, when played through equipment capable of resolving the higher resolution.