Over the years I've eaten at Barnard, Wellesley, Mount Holyoke, and Bryn Mawr. In high school I did a summer program at Barnard which included living in the dorms and eating in the dining hall. I remember it being perfectly fine, but nothing spectacular if somewhat limited options. I guess when you live in New York who wants to eat in the dining hall anyway, right?
I visited Wellesley multiple times since a close friend of mine is a student. Their dining halls are in their dorms, which is convenient, but is outsourced from one of those college food companies. I remember a lot of fries and pizza. When she visited me at Bryn Mawr she couldn't stop raving about the food in comparison.
Mount Holyoke was a brief visit, but again, nothing that stuck out in my mind as horrible.
As a Bryn Mawr student I'm definitely most familiar with our dining experience. Because our dining program is a college run program that is located on campus and not outsourced to a generic company, I think our food really outshines most other colleges. There are always lots of vegan and vegetarian options including opportunities to prepare your own meals. We have make your own stir fry, paninis, omelet/eggs, and more. Our menus are updated weekly online and available here:Menu
The sheer fact that Haverford has asked Bryn Mawr to essentially take over their dining program I think really says it all.
Best of luck to your daughter! I hope she gets a chance to eat on campus during her next visit (and definitely doesn't skip the garlic knots at Haffner!).