Jim,
I am not at all surprised at the results of these lenses, I was playing with and getting similar results with the Velostigmats back in the fifties, they weren't so cheap then, but they always delivered excellent results.
The term "contrast" to me is a catch all thing that many folks cling to. To my way of seeing most images today are over contrasty or the contrast is exagerated in such a way that it detracts rather than enhances an image. I believe there is a very thin line that an excellent image exhibits when the contrast is spot on. What makes that excellence turn into a nice or good photo is too much or too little of that contrast thing. When I look at the image of the little girl, it is a pleasant
easy view, I don't have to sit back and try to figure what your intentsions in making it were. It is all there to see.
Most likely I am wrong in the way I see, but much more contrast in my opinion would begin to detract from what already is a fine image as it is.
Thank you for sharing,
Charlie