Dolby Tru HD and DTS-MA have the core 5.1 encoding included in order to be backward compatible by bitstreaming via optical or coaxial. The less compressed DD+ and DTS-HD are the core. They may not necessarily be listed on the box but they are there nonetheless.

I have noticed that DTS-HD has been misused or now being applied in places where it should be DTS-Ma. The point is though that we can receive a less compressed bitstream from BD players than from DVD. The core DD bitstream is 640 kps, I'll have to see what DVD was and I will also try to find a link to this info.