I've synchronized the throttle bodies on my 10R (w/the Carbtune II) right after I got it. I was surprised at how out of sync they were. The idle definitely improved, as well as on/off throttle changes.
I had the tools to do it, since I had bought them for my 954, so I just figured I'd check the new bike when I was installing the PCIII and had the top of the engine apart.
I'd suggest it to everyone as a worth-it effort, but it is a bitch to get to the adjusting screws. It can be done without special tools (other than the vacuum gauge), but isn't fun.