Hi writersoul.
To answer your question, Jews who received a standardized education, traditionally do well. This is the case from those who go to public school or yeshivos that follow state requirements.
While public schools do teach classes for the PSAT and SAT, they are not any real advantage nor are they are short cut to what is required to do well on the PSAT or SAT.
The PSAT and SAT are not IQ tests, nor should they been seen as indicative of IQ tests or a reflection on if someone is a smart person or not.
The PSAT and SAT are based on real material that the student should have covered in their classroom experience over the years.
The questions are based on what should have been taught from teacher lesson plans from accredited schools who follow the guidelines of their state requirements.
Just a note: Where there is a will, there is a way. I know MANY highly intelligent yeshiva students who simply have not had the proper exposure to Math, Science, History, and English.
According to US News and World Report, over 60% of ALL those entering college, from all over the country, need to take remedial math, and/or English in order to develop their skills to succeed in their curriculum choice.
PSAT and SAT are just one component used to help a school determine if a student has the necessary background to succeed in their course of study.
If a yeshiva student is willing to work hard and catch up, like 60% of the other students in America, they will succeed!
Hatzlacha to the person taking their PSAT/SAT.