Why? Don't you think people can learn how to handle the machine they're given? I learned in a Chevette, but it didn't stop me being able to drive an XJ220 at a sensible speed.
One thing that amused me about the ZZR was that for all the gearchanges, if I kept below 8K, it was actually pootling about at 30. Bear in mind that I've ridden precisely two bikes about 3 miles before this; a 250 ancient thing ("Oy, Ian, can I try it?" "Ridden a bike before?" "Nope" "Okay") and a DT125 which I hated. I figured that if I could handle the clutch/gear/brake controls (I found it surprisingly natural, but I never seem to have good footwear), then I can adapt to any bike to ride it safely, if not safely and quickly right away.
I don't intend to have a learning curve which consists of "Cor, how fast can I get round here... set speed... whoops! Not that fast then *collect limbs*". I know a bike will be completely different, but I've been through well over 100 cars and can feel the chassis behaviour - I'm hoping/expecting that a bike will tell me more than a car does.
Richard