I agree that a quilt journal and a quilt label are not the same thing.
I also think that what the original post was about more of a technical/information sheet - kind of a "how I did it and what I made it of"
versus a
how, what, who, why, when, and what I was thinking while I was doing it sort of journal and did the cat throw up while I was making it sort of thing.
I think all of the above can be useful.
I was just thinking that if one didn't get around to doing an information sheet or journal, at least put something on the quilt.