There is (too) much discussion about this very topic amongst our training dept at the moment. Confusion has occurred in part due to the changes relating to areas of responsibility (A of R) and the Normal checklists responses that happened a few years ago "bleeding" across to the traditional Landing NNC responses.
This means one group suggests that the correct way is for PNF to say "xxx down" PF looks and says "down" and PNF also looks and says "down" again
So the PNF reads the landing NNC item including response and then the pilots respond
as per A of R. Seems silly at first but does fit in with the A of R philosophy.
I think Boeing simply did not amend the NNC notes to reflect the new philosophy. It needs a rewrite.
So the Jury is still out on this one with the result different instructors are teaching different stuff.
