I'm not in med school yet, but I'm from LA (hopkins undergrad now). And I've worked in a lab in MBI/Boyer Hall the past three summers, and seen two undergrads graduate from the lab and both are at harvard (one harvard med, the other biology masters/PhD program). Also in my lab down at Hopkins medschool there is one MD/PhD student there from UCLA undergrad. I know this isn't the greatest sample size in the world, so keep that in mind, but UCLA is well respected.
When I was deciding between UCLA and hopkins for undergrad I got a lot of advice from faculty members and others I know in the UCLA community. They said that UCLA will give you as good an education as anywhere else, it just will not be handed to you so easily. You have to work to find and get into the right classes, and you could very easily graduate without such a stellar degree. At a place as large and diverse as UCLA your class choice will be looked at closely beacuse that is what lets people know whether you used UCLA to get a degree which rivals any in the country or if you took 4 years of Turkish for basketball players.
Just cause I feel like I'm leaving my story incomplete, I was convinced I could get as good an education at ucla as I could at hopkins. I decided it was time to get away from home and experience another part of the country. I love it here, but still hope to come back and be a bruin for medschool.