why would it vibrate alot?
it just does....why i dont really know.
i know that my 600rr felt rock solid in a corner (manny had a 600rr previously) all of the GSXR's i have owned(04 GSXR600 & 05 GSXR1000) they all vibrate really badly in the handle bars and its something i didnt expirence in my experience with the honda. the GSXR front suspension gives you a ton of feed back which combined with the vibration might lead you to think that there is something wrong or loose. loctite the barends in or you will loose them and the vibration will get really bad. check them everytime you hit the track.
plus going from a 600rr to the GSXR is like going from a 240 to a Z06....you can feel the extra 20lbs that the GSXR has over the 600rr but you wll love the 50+more hp and 40+ft lbs of torque.