Since I have a Wing I follow our boards pretty good, there are a lot of Wingers who have gone over to the "dark side" (they're called Dark Siders and it doesn't mean they've gone out and bought an HD) and most of them swear by them. They do take a bit getting used to and the side walls will visibly flex doing "hard" turns in the twisties but for the most part they give excellent traction and even going into a sharp turn they still provide more contact patch on the road than a normal motorcycle tire. Instead of just throwing your bike into a turn like it does naturally, you will have to steer it with a lot more input from you. The benefits are a lot longer time in between tire changes. All of you guys know that the tires on the Rocket are not cheap, same goes for the Gold Wing. In fact there are a lot of Wing riders that ride just as agressively as you guys do and they wear out tires just as fast. We are just not as guilty doing "burnouts" as much as you guys do, but they can be done and believe it or not you can wheelie a Gold Wing there is that much torque available, just depends if the rider wants to do it or not. Most Wing riders are usually changing their tires out in the 3,000 -9,000 mile range depending on how agressively they ride.
The only thing more favorable to Wing riders is the availablility of different types of tires (Avon, Dunlops, Bridgestones and Metzlers, to name the more prominent ones) as opposed to just the Metzler being available for the rear tire on the Rocket.
One thing I have found missing in the discussions on tires on the Rocket is the front tire. Are there any recommended choices for it?
As for the so called "expert" on motorcycle tires that lives in Colorado Springs, personally methinks he speaks from ignorance on the matter as most who have spoken out against it have not ridden on one. A lot of the Wing riders have two different rear tires, the regular m/c tire for riding in the twisties and for long trips they'll swap out the rear tire for a car tire in an instant (changing the rear tire out on the Wing is pretty easy). I'm not saying I am moving in that direction, but there are advantages to the car tire just as their are advantages to the motorcycle tire, just depends on what kind of performance you are looking for.
Also, and this is from personal experience, the Wing is a fast machine especially for a tourer and it can lean a lot more than a Rocket, in the twisties it would or should leave a Rocket behind it's just the nature of the beast, however once you get back out to a straightway, even though the Wing is fast (118 HP, 125 torque) and I've had mine up to 131 on the speedo (didn't even know it as it was so smooth, then I looked down at the speedo and slowed down fast, I was toying with a Lexus at the time) the Rocket should definitely leave it behind just because of the acceleration alone even though stock they have close to the same speed.
And no I don't want to race anyone, I just enjoy the ride these days (or at least when I am home anyway).