(A good case in point is the Tyros 3 which if you try it live, blows all the online demos out
of the water)
Which is why the exact opposite view was put forth on the Tyros 3, live Vs Recorded thread? All the complaints there were that the demo made the keyboard sound much better than it really sounds out of the box. And that was due to the skill of the demoer, nothing to do with wave versus mp3. Everybody has an opinion.