If they are asking PhD programs in the specific major subjects (as opposed to the general graduate admissions administrative parts of the schools), that could be actually very useful information for students who may continue on to PhD study in the subject. A high school senior may not otherwise know whether s/he is limiting the possibility of PhD study in the subject by attending an undergraduate school that PhD programs regard poorly in the subject.
(Given the past threads on LACs, math, and PhD programs, it would be interesting to see where LACs tend to fall for math in these ratings.)
However, there are other factors that can affect how well the major at the given school matches the student. That can include such things as available options within the major, whether the major requires secondary admission, and other academic characteristics of the school overall (e.g. general education requirements). Curricular organization can also differ at different schools, and some ways of organizing the curriculum can be better for some students than others.