I started at UCLA with around 96 (quarter) credits from a mix of college-level courses taken at the local junior college and AP classes. It was (very marginall

I started at UCLA with around 96 (quarter) credits from a mix of college-level courses taken at the local junior college and AP classes. It was (very marginally) helpful to start out as a "junior" on paper, because I got a slight amount of priority when registering for classes. I didn't know at the time that they kick you out after a certain number of credits (around 240?), and this actually affected my choice of double major. I took a watered-down "linguistics and computer science" BA as my double instead of the full "linguistics" BA, partly because the unit cap was bearing down on me. Edit: it was "watered-down" because it required a ton of CS classes that I had already taken. Further, finishing most of the physical sciences requirements in high school meant that I wasn't exposed to some awesome professors in college. I imagine that some students who might have a deep interest in chemistry but a disinterested high school teacher never bother to explore the subject in college if they pass the Chem AP test.