The number listed is the "alpha" parameter, which according to Mandelbrot may also be considered a fractal dimension. There is something of a qualitative difference between alpha < 1.0 and alpha > 1: brownian motion with alpha < 1 forms a fractal dust whereas brownian motion with alpha > 1 is more line-like, and there are certain mathematical hiccups at alpha = 1.
Of the people listed, Temple Grandin and Michelle Dawson have been diagnosed as autistic. It is also possible for high functioning autistic people to go undiagnosed. There is speculation, for example, Thomas Jefferson was autistic. One may suspect there are quite a few such people.
One final thing to note: aside from considerations of who is autistic and who not, authors tend to have a more or less consistent alpha value across works. I am at the very least measuring some quality of the authors, as opposed to some quality of individual works.
1.44 mark twain huckleberry finn 1.49 mark twain yankee in king arthurs 1.52 charles dickens christmas carol 1.54 charles dickens two cities 1.54 jane austen pride and prejudice 1.57 lewis carol alice 1.59 charles dickens oliver twist 1.62 jane austen emma 1.69 jane austen sense and sensibility 1.76 lewis carol looking glass 1.76 lewis carol sylvie 1.91 cory doctorow craphound 1.97 paul harrison overclocking 2.00 charles darwin origin of species 2.00 cory doctorow down and out 2.00 cory doctorow drm talk 2.00 cory doctorow return to pleasure island 2.00 cory doctorow the super man and the bugout 2.00 g k chesterton all things considered 2.00 margaret mitchell gone with the wind 2.00 michelle dawson misbehaviour of behaviourists 2.00 michelle dawson no autistics allowed 2.00 paul harrison finity 2.00 richard stalmann should be free 2.00 temple grandin inside view 2.00 temple grandin my experiences 2.00 temple grandin thinking in pictures 2.00 thomas jefferson state of the union
(revised (again) 18 January 2005. Improved estimation method, hopefully more accurate. Estimation of parameters is a tricky problem.)