Dick7Access,
I guess it's a little late to add my 2 cents worth but for the record I was in the Army AF in the early 60s and as I remember it, a salute is always snappy, one count as we called it, except on a few occasions.
One of the occasions that I remember for a longer salute was if you were marching or riding in front of a troop review area. You would then hold your salute until you passed the reviewing area. Another time, of course, is during the playing of the National Anthem.
I don't remember ever being at a "flag folding ceremony" but I do remember being at funerals where the flag was folded and everyone saluted or stood at "Order Arms" until the folding was complete.
Not sure if this was what you were looking for but that's the way I remember it some 50+ years ago.
Hope your wife is doing well.
Don