I'm a lecturer, I agree with your friend.
In the nicest possible way, your daughter is four days in to a new life it's understandable that she's wobbling but, at the same time, she needs to grow up a bit and get on with things. Four days absolutely isn't long enough for her to judge things. She should give herself at least the first term.
I know this sounds daft but has she read the timetable right? I had a student come to me in tears once because she couldn't cope with her timetable but it turned out she'd accessed the whole department timetable so was going to lectures for every one of the 30-odd modules that were on offer.
It might be that she has and she just has a busy timetable. Doing a very applied subject, I don't think that's surprising and should be good preparation for the world of work in her field.
If I were you, I would keep my distance. Let her know that you're there for her if/when she wants a chat but don't call/text her too often asking how she is.
Encourage her to get out and about, meet people, join clubs, join the gym etc. If she's still struggling, she needs to speak to her academic adviser about exactly why that is (rather than just "I'm away from home and the course is hard".. with all due respect that's the same for everyone). If she's still struggling, you need to encourage her to give it at least one term with a completely open mind.
How about you arrange to visit her mid-way through the term one weekend for a day of shopping and lunch? It'll give her something to look forward to.
I'm sorry if my post comes across as quite harsh, OP 