“stingy end of the continuum”
I guess if you want the stingy end, that would be Caltech. They give zero AP credit and basically no credit for courses at other colleges.
There are summer placement tests for math, physics, and writing along with testing out opportunities for math, physics, CS, and chemistry. There is a summer online course on “Transition to Mathematical Proofs” they are supposed to take as preparation for the proof-based math series everyone takes. They say: “Our evaluation of TMP shows that students who do not take TMP are two times more likely to get a C or lower in their first Math course at Caltech.” DS has probably tested out of the first CS course, and may be able to test out of others.
DS had 14 AP tests with 11 5s and 2 4s. Plus As in 6 UCSB math/CS/science courses (including one upper-division) and 6 community college classes. But, he’s happy to have gotten in!