I honestly don't believe that HD Radio is the "savior" of anything - let alone terrestrial radio. Neither is webstreaming or interactive. It's all about compelling content and entertainment, something that may radio stations in both major and minor markets have forgotten. I like HD because in my opinion it sounds better when properly installed and processed - no more preemphasis on the highs and worrying about mod levels. Multicast channels provide more content (I like hearing jazz on some local HD-2's), and I do listen to the NYC CBS AM stations on the FM subs since AM reception in my truck is crap (electrical system is noisy) and AM sound quality on anything but a mod monitor is crap. I work at a AM station, and the only time it sounds decent is when I'm listening to the off air mod monitor - on every other consumer radio it's just blech. Would it have been better for a DAB Eureka-147 style of digital broadcasting? Hell yes - but the gov't didn't want to give up any spectrum for it. So this is the system we have, for better or worse - it will either get better and take off like FM did in the 1970's or tit will fail like AM stereo and fade away into the sunset.
As far as AM HD DX, I was using a Grundig tuneable loop with the Sony hd radio, and WBZ would lock, stay locked for a few mins, unlock for a few, then lock again depending on the skywave fading.
As far as AM HD DX, I was using a Grundig tuneable loop with the Sony hd radio, and WBZ would lock, stay locked for a few mins, unlock for a few, then lock again depending on the skywave fading.