One poster in the blu-ray forum said that his Oppo reported DTS-HD HR but his AVR reported DTS:X. Typically, the Oppo should report DTS-HD MA when the disc is DTS:X. So there may not be any uncompressed audio on the discs.Assuming you keep them let us know what you think. I didn't buy them since I already own the BDs and saw they were mastered w/ a 2K DI (was waiting this time for an actual review), but are you sure about the lossy being the primary channel? DTS always contains both and I wouldn't think DTS:X would work at all without the lossless flag (I am no expert but I thought the DTS spec was to use both so that if MA wasn't supported the receiver could "see" the lossy track)?
Being discussed here as well:
I had never heard of DTS-HD High Resolution:
The DTS alternative to DD+, DTS-HD High Resolution (often simply called DTS-HD HR) provides an enhancement to plain DTS similar to what DD+ offers over Dolby Digital, including higher bit rates and improved compression characteristics. Again, as with Dolby Digital and DD+, DTS-HD HR is encoded in the form of an extension to the core DTS data. Likewise, DTS-HD HR is optional for Blu-ray players as well, so many players extract only the 1.5 Mbps DTS core and ignore the extension data.
DTS:X on Streaming Services
DTS:X can support lossy encoding where bitrates are a concern as well. While no streaming services have announced support for, or released movies with, DTS:X soundtracks, it appears that it would be technically possible.