Good pass rates are the result of the hard work of the participants—especially in the weeks between the end of the Seminar and the exam itself—rather than of the Seminar instructor. The following table shows the pass rates starting when Exam C was initiated in May 2005, including the earlier Course 4 results since so much of the content of Course 4 and Exam C is the same; here the pass rate for one date is defined as (number of people passing the exam at the sitting immediately following the Seminar) divided by (number of people attending the Seminar that time), while the cumulative rates are the sum of those numerators divided by the sum of those denominators– starting with my first Course 4 seminar in May 2003.
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| Exam date | Nov 07 | May 07 | Nov 06 | May 06 | Nov 05 | May 05 | Nov 04 | May 04 | Nov 03 | May 03 |
| # in Austin Sem. | 24 | 46 | 42 | 47 | 24 | 7 | 21 | 23 | 6 | 8 |
| # pass in Austin Sem. | 11 | 19 | 35 | 27 | 16 | 5 | 11 | 16 | 3 | 5 |
| Austin pass % | 46% | 41% | 83% | 57% | 67% | 71% | 52% | 70% | 50% | 63% |
| SoA/CAS pass % | 50% | 43% | 56% | 53% | 51% | 53% | 51% | 50% | 51% | 51% |
| Cum. # in Austin Sem. | 248 | 224 | 178 | 136 | 89 | 65 | 58 | 37 | 14 | 8 |
| Cum. # pass in Austin Sem. | 148 | 137 | 118 | 83 | 56 | 40 | 35 | 24 | 8 | 5 |
| Cum. Austin pass % | 60% | 61% | 66% | 61% | 63% | 62% | 60% | 65% | 57% | 63% |
| Cum. SoA/CAS pass % | 51% | 51% | 52% | 51% | 51% | 51% | 51% | 51% | 51% | 50% |