The other thing to keep in mind is that twenty years ago those of us who wanted to play (real) piano in public would have to be content with whatever instrument they had available, whether we liked its sound or not and whether it was in tune or not quite - we would not think about bringing a real piano with us. At least now you can have predictability with your instrument and sound setup.

As to how the demo was made - I'd rather not know. There are many musicians who have a better technique than I do, and I would hate to have Yamaha tell me that the demo was recorded by the folks who are better musicians (and/or better recording whizes) than I am. I will settle for Yamaha's assurance that they use the instrument being demoed, and beyond that I don't care.

Regards,
Alex