https://www.aicpa.org/becomeacpa/cpaexam/forcandidates/faq/computer-faqs-3.html
Is the Exam scored on a curve?
No. Exam scores are not curved. Your score is independent of other candidates’ Exam results. The Exam is a criterion-referenced test, which means that it rests upon pre-determined standards. Every candidate is judged against the same standards, and every score is an independent result. For more information, you may read How is the Uniform CPA Examination Scored?
As you see above, this is from their FAQ department of their website.
I do agree with alloverit in that the lack of transparency is questionable. However, I don't think a curve would be implemented to just a few exams. If they were to “curve” it would most likely be due to some significant issue with certain exam questions and the “curve” would probably be implemented on all of the exams in that window. Maybe if A LOT of candidates complain about a particular simulation they got, the exam reviewers will possibly take a second look at the way the simulation was tested.
Question for you all – do you think the pre-test questions are already determined before the exam is taken by the candidate? This sort of goes along the issue of them not being transparent in their grading. I wonder if they can use this idea of ‘pre-test/non graded' questions to their discretion while they are grading. Surely, the number of pre-test questions will remain the same, yet which questions are marked as pre-test may be at their discretion. Sounds like a curve? Maybe/maybe not…
I do know one thing, they charge a fee for anything you want to do and the fees are pretty heavy. I don't think they have a problem with candidates having to re-take the same exam 5 times each. So I can't really imagine a curve (or whatever they want to call it) to your advantage if you are borderline passing/failing.