I disagree with your categories. I think you’re right in that there are people on this earth that can safely learn with a supersport (one of my best friends is one of them: two years and 15+ track days without a drop, crash, or accident of any kind). I don’t, however, think that we should make that possibility known in any literature on this site. If somebody comes by asking about it, we can judge their attitude and give them advice on a case-by-case basis.
The problem is that almost everybody (and I’m as guilty as sin on this) THINKS they’re safe, cautious, determined to practice and develop skills, “man enough,” etc. Whether they think they’re good enough to handle a GSX-R or CBR is immaterial. Those that want the supersport in the first place (*cough* me *cough*) are the same guys who brashly think they’re among the few that can handle it.
If I hadn’t been strongly pushed by friends, MSF safety courses, and various books/websites to start on a 250, I WOULD have purchased the GSX-R first. I’m REALLY glad I waited until I had almost two years and 13,000+ miles on my 250R to bump up to the bigger bike. Not only did it probably save me from some bad experiences (worst case, death), but it gave me an appreciation for smaller displacement riding. As I’ve said before, the latter is true to the point that I’ve not sold the Ninja to this day. I still love riding it around, despite my utter infatuation with my Suzuki
Last thing: I’ve got my work/school crap wrapped up for now so I’m going to try to put in some time on this beginner bike stuff. I’d already gathered some specs for about 10 of those bikes (a lot of the ones I’d originally included). I’ll try to get those for the other bikes and figure out how to present it all.