I'm up in St. Louis with my wife's family for Thanksgiving and my brother in law has been trying to get me to take his R1 for a spin for quite a while. First off, I've never ridden a supersport, much less a literbike. So I was a bit nervous to say the least. I've been on a Kawasaki EX500 since May of '06 and I'm reasonably comfortable with the bike. It's predictible, it's forgiving, and it doesn't have a "freak" power band...
It was getting dark but seeing how this is the last day was going to be warm I figured I'd give it a shot. So I geared up and set out. Instantly, before I noticed the power, I noticed the steering geometry. It's so much different, not even the riding position but the rake/trail makes a huge difference compared to my EX500...changing direction takes barely a thought, to the point of being dangerously sharp. Had I not known the basics of riding it could/would have been much more scary.
They live about 30 miles West of St. Louis in a backwoods sort of area so the roads are relatively empty/curvy. I headed out and decided to see what it could do. I put it in 2nd gear and gave it some gas. Wow...this may be an "old" R1 (2000) but man there is no flipping comparison between a bike like it and my 500. I guess I'd equate it to bullriding when the bull just wants to go go go and the rider holds on for dear life. I looked at my speedometer and gasped, 101 mph in what felt like only a moment. It was a mix of thrill/gut wrenching fear all at the same time. I gently rolled off to slow myself down to a "reasonable" speed. I know I am no where near ready for that kind of power, so I played it safe, but nonetheless I certainly enjoyed the ride. Since I didn't know the roads very well I really went pretty slow (within the 60 MPH limit) just trying to feel the bike out. If you so much as touch the throttle it goes, there is no warning...unlike my bike this bike is made to react instantly hard.
Went about 5 or 6 miles down to a gas station and turned around and came back, all the while trying to get used to both the riding position and handling.
Both on the way and coming back there is a pretty long straight and there wasn't any traffic so in 2nd gear I hit probably 110, my only real "hooliganism" that I had. The bike will hit 100mph in the blink of an eye. Gas it too hard and your front wheel is hovering above the pavement.
I got back to the house and my brother in law was outside waiting for me with a smile on his face. I pulled into the garage and he asked "so, what did you think?" I sat there for a moment and the only thing I could say was "this bike is freaking scary!" He chuckled and nodded, tellin me that was what he thought when he got it (he's been riding since he was 12 or so and is now 28, didn't get this bike until about '02). His dad, who's been riding for 35+ years rode it one time and said it'd the only bike he's ever ridden where he didn't feel like he was in control, it scared him too.
I certainly have a new respect for these bikes. Anyone who thinks they can safely learn to ride on a 1000cc supersport or even a 600cc supersport is only fooling themselves. The razor sharp handling and on/off power is an accident waiting to happen for anyone who's not ready for it (and trust me, as a "beginner" who's learning everything at once you're won't be ready...), the handling for me was honestly more unnerving than the power. I've got reasonably good throttle/clutch control but there's no lever for steering control. I've been riding for a year and a half and even I was awestruck by the bike. There is absolutely no logical reason to have that much power in a street bike...but boy it was a thrill.

I'd like to take it out again when it's a little lighter just got get more of a feel for it. Hopefully I'll get a 600cc supersport next spring, but even that'll be a new experience.
The moral of the story, if you're new to motorcycles and think one of these bikes would make a great first ride you are crazy...the bike is absolute unforgiving. Stick to a "beginner" bike and build your skills so that when the day comes that you ride a bike like this you'll have the skills not only to somewhat control it but maybe, like me, even enjoy it.