Just a couple of notes (Richo was helpful with this) - but it seems that in low-light situations, whether you're using a fast film or not - I think the exposure needs to be bumped up. I don't think this is because of the reciprocity factor - but it appears to me that several films which I used at rated speed at night were undexposed for the shadows. The same films, shot and developed the same way in daylight were just fine.
So the next time I'm shooting Delta 3200, I would probably rate it @ 1200 or @1000 for night stuff and use development times for ASA 1600.
As far as this photograph goes - I don't know anymore about it than you do and didn't wait around to find out. A quick shot as I was about to cross 86th street.
