Not so far. She and I are getting ready to go find her mother Valerica. So far the dialogue hasn't changed much.
BUT! I did notice something different! She wasn't very receptive when rescued (soloed that), and after delivering her to her father, I went and did a bunch of quests/jobs I'd been delaying. At the same time, I went to Riften to talk to the Priestess of Mara, and got the dialogue about marriage.
When meeting Selana again with Isran, she was much "nicer". Now, if that's an indicator, I don't know. It was a minor change in "behavior" I hadn't seen.