I was #17 on the waitlist last year. I ended up deciding to go to UOP, but during my 3rd week there, they called me and offered me a spot. This was the Thursday before classes began on the following Monday! I think the last update that I had received put me at #4 on the waitlist. UCSF actually only accepted two people from the waitlist last year - me and someone who was at USC. I will spare you all of the details - I'm sure you can search this forum and find my sob story(ies) from last year. So...it's possible, but it just depends upon how long you're willing to wait. Since I knew that I was going to be in Stockton (not too far from SF), I decided to leave my name on the waitlist. Once classes at UOP started, I had forgotten about UCSF (I thought they started at the same time) and didn't expect to get in. So here I am now at UCSF.
...jason lives happily ever after (well, sorta)🙂