Instead of asking the tour guides about areas that are 99.9% of the time going to be outside their areas of knowledge, stop in the IT Department after the tour and ask there. Generally, the IT staff of universities are very well versed in using *nix boxes, and would be able to provide you with a much more useful answer.
However, to more directly answer your question. Based on my experience at my school (Northwestern University), I have found Linux compatibility to be very situational. At the most basic level, I have found that I sometimes have problems connecting to my school's wireless network on Ununtu 9.04 due to some incompatibility with 802.1X authentication my school uses. At a software level, Linux compatibility tends to vary from department to department. For example, an engineer needs MatLab, which is available on OSX, Windows, and Linux; but an journalist needs InDesign, which is only available for OSX and Windows. So, unless your daughter has a clear idea of what she wants to do and knows the software she will need is available for Linux, there is no guarantee that any school will be "Linux Compatible".