Hey, so I went to the SFSU post-bacc program and am currently applying to med school. I did most of my pre-med required classes there. The 79% figure also reflects the fact that it's hard for the program to keep track of their students once they leave the program and apply to med school. Students who leave often do not bother to notify SFSU of where/if they got in. Ultimately these figures---among any post-bacc---are going to reflect the caliber of the students who attend rather than the quality of the institution. As stated above, it's mainly YOUR performance---not the school's---that determines whether you'll make it into a med school or not.
It does suck that the program lacks linkage, but I don't think you'll find any post-bacc in the SF Bay Area that does (look at UCB extension, Mills, and CSU East Bay---neither has one, I believe). Someone here said that a post-bacc without a linkage is a scam. Not sure how it's a scam, considering I attended the program and will be attending medical school in fall 2014 for sure. I know many peers of mine who attended the program and are having a good cycle, getting into good med schools, etc. I'm not stating that SFSU is an ideal post-bacc, but that it's at the very least an adequate one, as I've not attended other post-baccs so have little basis of comparison. In my experience, the classes were fair and not unduly stressful, the teachers were decent or good, and the committee letter was a nice plus. The students are really friendly and collaborative too, mainly because there's never an unhelpful grading curve (and we're not d-bags).
N=1 but you can click on my mdapps link below my profile picture and see how I am doing in terms of my success, coming from the program. PM me if you have any questions about the program. I enjoyed my time there.