Well that makes sense since at UCSF the admissions process is such that your primary application is to the medical school and you then receive an MSTP application with the secondary.
While I'm not surprised that many people outside of medicine and science have never heard of UCSF, I think it is not a matter of public reputation per se, but of public awareness. The UC Medical Center is a major referral center for the Bay Area, California, and the Western U.S. When it comes to certain areas of medicine or surgery, it is THE major referral center (i.e. prion diseases, AIDS, etc). San Francisco General Hospital is the only level-1 trauma center in the city and serves a large population of the homeless and the poor. Additionally, UCSF has an international reputation for its biomedical research, with Nobel prize winners, many members of the National Academy of Sciences, and a plethora of Howard Hughes Medical Investigators. The medical school itself has consistently ranked in the top 10 and is the top public school. Much excitement has been generated as a result of the new curriculum, which features an integrated organ-systems based approach to learning and plenty of free time to explore related or outside interests.
Simon,
If you are curious and want to find out more, I recommend checking out the web site:
<a href="http://www.ucsf.edu" target="_blank">www.ucsf.edu</a>
Also, if you have any specific questions about UCSF, please feel free to contact me (I'm a 1st-year student).