Quoting Rob Sherratt from the Korg Forums:

"To those concerned about DNC.

The new articulation facilities are accessible to people creating their own sounds. There are many new parameters associated with assigning Multisamples to sounds.

I have heard new Trumpet, Nylon Guitar, Whistle, and Jazz Organ sounds, created by Korg. I expect there are many others but I haven't had an opportunity to hear. All these are superb. They were being demonstrated at Pakefield. The new "OS2" sounds use existing factory samples from ROM, but the algorithms used for triggering the samples are much more complex and the sounds are much improved as a result.

For example, play the Jazz organ and you get a nice growly percussive effect when you play a chord, and then you get a much softer glide organ sound (without the percussion) when you glissando to the next held note."

All I can add is that Rob is a very serious guy, who knows his stuff.