Well that would eliminate the Roland. When switching styles (with the fill) or selecting a break the 900 "knows" which beat you are on and seemlessly changes the arrangement/Drum fill to reflect that perfectly. That feature amazed me almost as much as the Kurzweil's ability to change the style arrangement dependent on the actual chord played.
The only "glitches" I have had in the Yamaha are those in which I was sloppy in switching chords.
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Yamaha Tyros 4
Yamaha Motif XS8
Roland RD700
Casio PX-330
Martin DC Aura
Breedlove ATlas Solo
Bose MOD II PA