As a reminder to those who brought up the valid objection that you cannot equate threshold changes in a compressor, for example, with exact changes in monitor level---yes, absolutely true, and I did mention that as an asterisk in my first post on this subject.
Nevertheless, I don't think this negates the need for or the concept of knowing exactly how far you have moved your monitor control. If only to say, "wow" I think my ears are getting fatigued---this doesn't sound loud to me, but look, my monitor pot is set 3 dB over where I usually keep it, and look at the meters!
BK