I just found this on my schools Career Services webpage (
http://cornell.placementmanual.com/graduate/). I believe it supports my statement that their are type types of american graduate degrees.
Graduate School
If you plan to pursue a graduate research degree, such as a Ph.D. in English or physics, which emphasizes original research, discuss your educational goals with Cornell faculty, who can be a valuable resource. Their knowledge of the various schools, including reputation, faculty, research being conducted, and your chances for admission, can help guide you.
Professional School:
If you decide on a career in medicine, law, public health, or social work, for example, you will need to attend professional school, where you'll acquire knowledge and skills to meet requirements for practice in the field.