I think Donny likes the factory intros, and he also appreciates making your own intros. That isn't inconsistent with his stuff about, "don't be a purist."
I like the factory intros. I have them pretty well remembered, and I always play along. It's probably just for ego. The Yammy intros are so well instrumented, they do not require any accompaniment. My addition is probably slightly cacophononous.
Whatever floats your boat.
I loved the intros on these styles - and the variations. At
www.yamahamusicsoft.com they have some other recent T3 styles as well, and they also sound fantastic.
If they don't come out with versions of these styles for the S910, then I just might risk downloading the T3 versions, and I'll see if I have the same success I've had with other T3 styles.