It's really a combination of so many different things which govern how well our DCs fit in at uni. A lot being luck, who they share a flat with and how well they gel with course mates.
I've been amazed at DD, who is generally a quiet girl, fairly shy. She's absolutely loving it, made lots of new friends, enjoying her course, really embraced freshers! This was a girl who never drank at home, always drove to parties/nights out!! Her flat mates are lovely and she said she feels like she's know them for years, not three weeks. I couldn't have hoped for a better start for her.
Good luck to those whose DCs are struggling as it must be very difficult when they're so far from home. 18 is still very young and it's massive step for them.