While I know this forum's registry isn't a full/accurate sampling of all M5's sold, I did think it was interesting to look at the data that was there. I tweaked the information a little bit to allow for typos (or value normalization) or what appeared to be incorrect information. Just for fun of course...
The zip file in the post has the Excel with the two pivot tables should anyone wish to carry it forward.
In response to your request Stealth:
Very few Frozens, so I just filtered them down:
As for "Color Family" (Apologies to anyone offended by how I categorized colors into families, particular "Gray"), here is the quick percentage chart.