AGatorForever is right. Its about 2 weeks, unless you're among the lucky few to interview the week before winter break, they give the answer at the end of the week because they don't want to have you wait winter break.
As for how summer semester works I can recall a bit: It starts the last week of May/first week of June. The first two days are orientation, getting introduced to the staff, getting acclimated to the atmosphere, getting to know your class mates, scavenger hunt, etc. The first Friday you guys go on a rural excursion to a place like Bonifay or Quincy to see what the mission of the school focuses on. After that, and current M2s feel free to echo this: in my year they had a class called "Values and Virtues" where the first 1.5 weeks was mainly just talking about ethics and being patient centered. Now, I think they may have mixed in into the whole summer. So after that, you start Anatomy. Anatomy is taught by Dr. Laywell. Awesome guy, super chill and hilarious to boot. Anatomy is very fun. But it is also very hard. It is incredibly compressed because most schools have anatomy over a year or several months but for us it is just 3. Also, there is like 1 embryology lecture a week. Also also, a grand rounds each week, usually on a Friday. In addition, there is also CLC, the clinical component to your curriculum. You start off the first week seeing patients, they mean that. But for the first week, maybe even first two weeks, it is just washing your hands and doing your intro, "Hi my name is ___ and I'm a first year med student...blah blah blah" which is incredibly important but becomes second nature after the first several weeks. The head of the CLC is Mrs. Danforth, she is like the nicest person I've ever met. She bends over backwards for us, and she is so understanding. She is so sweet and will help you in any way that she can. The way that the CLC is structured is usually pretty logical: it usually has something to do with the anatomy you're learning this week or did learn last week: for example- our week 4 was thorax and lungs in the anatomy lab, and in the CLC it was the lung exam. On Tuesday you practice the exam of the week on each other with faculty in the room. On Wednesday you practice on a standardized patient in front of faculty. On Thursday, you go in by yourself and perform the exam on a standardized patient. No faculty. You are watched through cameras and one way mirrors during the encounter. The faculty comes in after you're done and tells you their feedback and, depending on your performance, whether or not you have to do it again on Friday. You go to lecture for about 3 hours a day, and lab Monday-Thursday but you only actually dissect 2 of those 4 days, the other 2 are prosection where you watch the TA's explain the dissection of the other groups. They added another component to the course which I applaud greatly, I wish we would have had it- radiology. Each week or so Laywell has a lecture on radiology. This helps a lot because of the structure of the practical exams. Ok so the exams: 3 in total- each divided into a computerized multiple choice exam and a practical exam down in the lab. The computerized exam is usually around 80 questions and consists of multiple choice questions, divided into clinical questions from CLC, clinical questions from the professors, and anatomical and embryological questions, as well as some ethics questions. The units are divided into 3 chunks: Musckuloskeletal (upper/lower extremities, bones, muscles, etc,) Head/Neck/Neuro/Cardio/Respiratory [Thorax and Head/neck\] and Abdomen/GU. The practical exams work like this: the TA's (the 25 now second years that are going to help Dr Laywell in the lab and Danforth in the CLC) write the questions and are approved by Laywell. They are fill in the blank. There are 25 bodies. 20 that the students work on, and 5 prosection/faculty bodies. Each body has 2 tags on it. The tags wrap around a muscle, nerve, artery, vein, or dry bone structure. The questions could be as simple as identifying the structure, or something as involved as the artery that supplies the tagged structure, or the muscles that are innervated by the nerve that innervates the tag, etc. There are 60 total questions, 50 are on those 25 bodies. You have 30 seconds per question, 2 questions per body. 10 questions are what are called Rad-Sim, which are CTs, MRI's, Xrays, etc. Again, fill in the blank.