I'm not sure that the movie was able to capture the build up to their romance, but I agree that the looks they gave each other in the movie said a lot of what Ayn spent a couple hundred pages telling us.
I may be a little harsh since I've picked up the book again recently. Having it so fresh in my mind makes me more critical of what they left out of the movie. I intended to just read part one to be prepared for the movie, but couldn't stop. I'm about 850 pages in now.
Some of Rand’s writing about Hank and Dagny’s love affair was creepy... I know she was, perhaps, trying to create a metaphor about ownership and service and money... but it just came out as creepy and rough.
A lot of the politics Rand wrote about have come to pass — thankfully, society is a bit more forgiving about personal lives than in the book.