Well, I received the Regent's Scholarship too, but that still means you'll have to pay more than if you went to a UC.
I did one year undergrad, took my DATs the summer after freshman year, applied to dental school, and got accepted during my sophomore year when I decided to defer. I then continued onto my junior year here when I decided to add on another major (which I belived would help me get in since I already applied the year before) and then applied to dental school again. This time, I got into UCLA dental school, and I'll be finishing up my majors this May.
With just one year of undergrad + the Kaplan prep course and a whole lot of studying by myself, I felt I was quite prepared for the DATs. I averaged 27AA and a low 18 on the PATs, but I didn't retake the DAT despite the PAT score. I felt that the Gen. Chemistry courses here was sufficient for the DAT, but the Biology classes lacked a few essential details which were fortunately covered by Kaplan. Some people might think that the Kaplan course is a waste of money, but I think it covers little details that you might've forgotten or might not have learned in your General Chemistry/Biology courses.
IMO, the pre-dental advising here at UOP is pretty much only geared towards the UOP School of Dentistry rather than at all the dental schools. I had to contact the dental schools myself (during my freshman year) to ask about their course requirements and to make sure that I fulfilled them on my own (ie: English, Psychology). * Note that the Mentor courses here at UOP may not satisfy English requirements for certain dental schools. The Mentor Seminar Series (3 total if you want to get your B.S.) is an ethics/critical thinking/writing course but due to its course title and/or course description, will be turned down by some dental schools as meeting their English requirements. *
And to answer your last question...Yes, I'll be 19 when I head into dental school next year, which, if you backtrack, made me 16 when I entered college.
If you have any more questions, feel free to PM me or just post another message and I'll be sure to get back to you. =)