Thanks, all...
for your insights.
I'm disinclined to defend the confusion I expressed originally, and which, in any case, isn't shared.
Still, it's clear to me *I* would have written different copy IF (1) it were my job, and (2) I intended to be clear about what seating configurations would appear in what cabins and on what CX aircraft, and when, because, to this native English speaker, as things stand now, I assure you, "it ain't"--as, I daresay, from recent posts, it also is not, to others as well.
I'll see what my nephew reports on his return.