PLEASE READ...This is another great example of needing to take all advice on this board w/a big grain of salt, since I managed to get CA residency in considerably less than 2 years. I don't want to mislead you either, b/c it's a complicated system, but there are three things you should do RIGHT AWAY: 1. call the CA schools you are considering and ask them precisely what the rule is. I wouldn't exactly recommend giving your name at this point. I predict that you will find that the schools actually have different rules, and also that they will have a harder time answering you than you would think. I believe that UCSF had a cutoff the year I applied of June 15th, but again, check it. 2. As soon as you get to CA, register to vote, get a drivers license, open a bank account, get bills sent to your new address, and charge something on credit cards in a CA store. Keep all documentation in a very safe place. 3. Have a good reason that you moved to CA, i.e a job or something. Don't be saying, Oh, the cheaper tuition. That's not an impressive answer, though it may in fact be true.
Again, I don't want to mislead you, b/c it can be hard to prove residency, but don't give up just yet...see what info you can drag out of the schools first.