I saw the Dream Street exhibit at Duke. I agree -- it was really something and I can remember right now standing there and studying the grain. His blacks were like textured charcoal on paper, almost three dimensional.
I wouldn't call the prints huge, though. I seem to recall few being longer than, say, 24-30 inches in the longest dimension. But my memory could be failing me. I do remember meeting Smith's son, who was a very nice man who works in public television.
I think the Dream Street book turned out quite well, and give it as a gift fairly often. But you are right, some things you have to see in person. I went up to NYC once to see some huge, non-vintage prints of Bill Brandt's beach stuff. The grain was amazing. But by using scanned negs, it was something of a reinterpretation. Also at Duke, some years back, I saw huge prints done from scans of Walker Evans negs with tons more shadow detail.
Whether it's right or wrong, I don't know. But these experiments are interesting to see.