@SaphireNY, you’re not helping your point by conflating all sorts of different tests. The SAT, LSAT, and GMAT may be considered types of IQ tests, but they are all different (especially with the SAT’s funky writing section now). Also, the competition in the LSAT and GMAT are tougher because law school and b-school applicants are a self-selected bunch, so someone being 99th percentile in the SAT may very well not be for the LSAT and GMAT.
The MCAT is very much a subject test (med schools actually do care if you learned something in Orgo).
The ACT is it’s own different beast.