The G1000 was definitely stereo. As was the SGM180 soundfont. Those were the only other in addition to DNJ's that i downloaded. No, I do not own a Tyros. I have listened to many a tyros demo though, and I can still tell mono sound when i hear it. DNJ's impromptu demos and his upload of this smf definitely sound mono.
As for the veteran comment, maybe it was uncalled for....maybe. It just seems odd to me that so many threads regarding mono versus stereo have been had here if nobody other than myself has noticed that DNJ's tyros II mp3 most definitely sounds mono.
Also, You'd asked that he do no tweaking to the smf before he recorded it. Now tell me, is my sense of pitch off too, or is your version in E and DNJ's version in D?