Jørgen Jakob Friis
What I tried to express is, that kamae sometimes is used as a term for 'physical stance' more than as a word for the state of physical readiness and mental preparedness. Also the way I use the word 'posture' in my post was ment to be long along the lines of 'the way we carry ourselves and our body'.. Including the notion of kokyo in our walk and the grounded sensation in each step. I guess that's what you explained in a different way as being an integral part of the term Kamae.
I would use the term Zanshin for that.
I was once talking to an Aikikai Shihan I admire about the fact that in Shodokan there is no kamae per se rather shizentai (natural posture). His comment was that kamae is really beginners practice and eventually we are supposed to move away from it. Different teaching methods but one of the problems with assuming a particular kamae is that you limit your responses.
Not sure what this has to do with time in rank but there you go.