It may not matter what other people are doing but its interesting hearing other peoples thoughts. I guess that's why we all read this forum.
I can't see how this is interesting or useful unless you can put that one session into some kind of context, or to get a full picture of the taper. Without it you get a lot of different numbers which mean little or nothing.
You said it - with the thoughts and background of the runner it's useful, otherwise it's a room full of people shouting out random numbers.
If it helps, for my last 3 marathons, one week out the Sunday run was 10, 0, and 26.2.
I don't imagine that everyone has your experience and/or confidence in their training, so they just want a general idea that they are doing roughly the same as most others.
As for interesting, I think your three runs the weeks before are very interesting.