I know why they make us wait.

It’s because it’s summer and people are away on vacation. The exams were graded awhile ago, and now all those Institute folk are hanging out elsewhere for a week or three. After they release the results, there’s going to be a flood of excitement from all sorts of different people. People will want answers, and that gets stressful and time consuming. If it were me, I’d grade the exams fast and then take off for a bit.