Originally posted by Fran Carango:
Most likely the newest added sounds that require 3 or 4 cross fades..may be the least priority reserve..Ian mentioned that the Tyros3 and 4 have this now...Maybe not quite as good as the Roland format.. 
Yes, Fran, I believe you are correct...it could be the new vocal patches...until Yamaha confirms it, we'll just have to go with that idea.
Also, these voices, being SA and SA2 use a lot more of the tone generator than the scat voices on your G-70.
I'm curious to see if it happens on your G-70, if you follow the protocol that Scott laid out in his post.
Certainly it is a very extreme situation, but, it is there, nonetheless.
Ian