Thanks to those who presented addtional measurements and additional commentary saying that more detail is needed. Indeed, I couldn't agree more. However...this was not meant to be comprehensive - it is just a useful starting point, using simply made measurements, to provide guidance to those who are 'fighting' the ergonomics of their instrument.
As to one particular point, what is more important thumb to pinky distance or index to pinky distance? I also expected index to pinky to be more important, but in doing the statistical analysis, the significantly better correlation was to thumb to pinky. A bigger dataset may have produced a different correlation.
So, submit your measurements!
And eventually, I will recalc using the additional data.