Hmmm. Cool thread. I think the place to which I have gotten is that the Ton is simply a reference number. It's significantly past any posted speed limit in the US, and will therefore earn you a goodly ticket if you get caught at that speed. This makes it 'fast' in the eye of the law. The other bit I've learned (by painful self-experience) is that the Ton is also fast if you crash at that speed. Either way, it is a respectable speed. But...
How does this translate to my bike riding? I've pretty much figured on compartmentalizing my riding. As some have mentioned, the Ton is approached differently on different bikes. The Ton is terribly quick if achieved on my Heritage Softail. Not quite as fast on the Sportster, and virtually boring on the VTR. While it can be fun to ride a slow bike 'fast', I've never been able to get over the fact that you are still going slow. So I've modified my stable to include slow bikes for riding slow, and fast bikes for riding truly fast. I can take my Softail out, ride at car speeds, and have an absolute blast. I don't have to pretend to be racing, don't have to 'tuck in' to make 65 MPH, and can quite literally enjoy my ride, and no longer have to compete with my inner Go-Fast Guy. It's different riding.
The flip side of this, is that once you have experienced riding 160+, you will never view 100 MPH the same again. There is nothing to match the thrill of riding at the absolute top of man and machine, realizing you will probably die if you crash. That said, I've chosen to stop this riding style on the street, and instead limit it to machines prepped exactly for this sort of thing, at facilities equipped exactly for this sort of thing. You have to realize what you are doing, and by trying to do this on the street, you will either be holding back, or you will be getting killed.
One thing I want to make clear, in advocating modern sportbikes, is that riding to the limits of a small, 'vintage bike' is admirable and fun in it's own way, but simply does not compare to riding to the limits of a production GP bike. It might take all of a rider's skill to go fast on a CB750, but you will still only be doing 120 MPH. For me, it took all my skill to ride the 1098, and that thing just laughed at my amateur attempt.This means that there is room to improve, and an even greater lilkilhood that I will never cease to improve.
In my mind, the greater challenge is to become accomplished on the monster machine--something only a very few ever achieve. But the other fact is that most of my riding will be done legally on the streets, and therefore, I have machines that perform accordingly as well. Neither agenda is right, both are equally important to me, and both have their places. Just not together anymore.
Just my .02