Every other sound mode will create dual mono. Anybody who says they hear stereo from a 1.0 track is an idiot.
I believe we talked about 2.0 tracks and how to (quickly) confirm whether they're mono or stereo/surround. Warner is often using "1.0 mono", but usually mono tracks are also 2.0. Giant has DTS-HD Master 2.0 track (which I believe is mono).
No "idiots" here.
But generally speaking it's a bit letdown if the reviewer lists the audio as "2.0" and doesn't necessarily tell that is it Mono, Stereo or perhaps 2.0 surround. Of course mono, stereo or surround alone doesn't tell that much about the quality of the audio, but I guess it's a good starting point.
EDIT: And like I said, "Pro Logic" from your receiver with Mono track (whether it's 1.0 or 2.0) will not create dual mono. It'll create 1.0 mono (audio is coming from the "front center" channel only). And IF the audio is actually 2.0 stereo/surround (and not mono), you'll get some surround activity.
Edited by Jari K, November 17 2013 - 11:15 AM.