Originally posted by Diki:
Don't know if you heard this yet, Kingfrog, but this is me improvising in Pianostyle Mode on the G70...
. http://www.roland-arranger.com/smf/index.php?topic=444.0
Seems to track me fairly decently. I know I can't play COMPLETELY pianistically on an arranger, because with a piano, so much is implied rather than played, but I find I don't have to adjust my playing THAT much...
And then just adjusting to that 'don't play more than two notes at a time and the chord won't change' mode. You'd be amazed at how much you can play with just two notes, if your fingering is clean... 
Pianostyle Mode with the OnBass (bass inversion) ON on a Roland is VERY pleasant for a pianist to adjust to, IMO...Very Nice...and it tracked very well. The string line sounded overdubbed rather then implied. I'm liking the G70. If I could find one cheap I might add it to the arsenal.
The problem as I see it on the Yamaha appears more with up tempo music with quick chord changes. For a walk up player set on full keyboard on the Tyros or S900 I have observed it's a mess in action. Perhaps the G70 has much better AI?
I don't think the Yamaha gives one BOTH on Bass AND full keyboard AI. I still have a lot to learn about these things.
A nice smoky track you laid there.