Your references are alternatives for me :)

Properties are obviously related, but in practice that doesn't mean you have many of them in single selectors making that kind of organisation stand out. And why group in that order? why color after position? and inside each group how do you order the properties?

Surely you don't like to work with uncomfortable things...

I'm in favour of experimenting of course, but how do you analyse that data? you have other data to compare to?

In the end, I don't see what kind of gains you get spending time with grouping since it's simply a more picky way of organising unstructured code and you always have to remember how you're ordering. I don't have to agree on this because, based on my own experience, the trade-offs aren't worth. I too like to get stuff clear, concise and organised, but specially GTD.