Well, whether right or wrong, here is the answer we got from a controller in the JFK tower:
"From an ATC perspective, we anticipate
the crews exiting the offset final whenever they determine they have visual
and need to line up. There is a variation between crews, and we have no
issue with that. I have even briefed the local communities regarding noise
issues that flight crews have the discretion to deviate."
More comments are certainly welcome and appreciated, but I thought his answer would be of interest.
Thanks everyone,
Mike