Just like vibrato on a voice, or sax, or anything else, it is NOT applied to every single note, only at specific points. This one had it delayed on every note. Awful...
It would be nice if you could control it with an Aftertouch effect so the user could enable it only when needed. It sounds like it is built into the sample though because you'll notice when he holds the key down for a certain length of time it "always" triggers the effect, and unfortunately Yamaha arrangers are notorious for their mediocre editing capability which probably means there would be no way to remove it - through editing the voice; hence users will most likely be stuck with it and their only other course of action would be to release the key "before" it kicks in and that could be problematic if you needed to hold the key down longer for some reason.
Well, I have heard that the head sound designer, who was responsible for all signature sounds in the past, has left Yamaha several months ago.
Hopefully he got picked up by Roland and company and they will pay him what he's worth.

Best,
Mike
[This message has been edited by keybplayer (edited 07-16-2008).]