I predict that you will find a narrow range of responses consisting of...I started at 76 and by the end of the 2nd week I was averaging 92, and by the end of the 4th week ,100%. I think SDN selects out only the most brilliant med students from the entire med student population. Its the same way with the MCAT in PreAllo, everyone has a 34T.
I can provide you with this info however. I took the average at the end of each week of studying and I increased roughly 3-4% per week (doing 50Q, random subject tests). I do not attribute this to "learning" new material, but learning how to answer their questions. It does become somewhat predictable, mainly because it seems like a lot of their questions (mainly in Path), focus on the same disease process over and over (ie. I think I had like 20 questions on Myasthenia Gravis). How many different ways can you kick the dog?
Dont put too much stock in those percentages that you get, as I am sure some of the questions come out of left field, and some of those answers that they deem "correct" are debatable.
Good luck and keep your head up. 🙂