1. All assessments (at least that I can remember) are timed the same way that the USMLE exams are, so 1.5 mins per question.
The quizzes are meant to help keep you on track for the course and are generally low stakes. Grading varies slightly by course, but generally, you shouldn't need to do any extra prep for them if you're studying consistently throughout the week.
Exams were a bit more hit or miss. I don't know if they reverted it, but for the systems courses our M1 year, they sprang a BS change where they switched it from full NBME to a mix of NBME/professor questions and a lot of the professor questions were written poorly (the GI exam sticks out in particular where they had to throw out 20% of the professor section of the exam because the questions sucked). M2 year exams were a lot better since they returned to all NBMEs with the exception of Neuro/Psych, but those questions are fine since the course director has been the same forever and has spent years refining them.
All that being said, studying was fine and I was able to get through the exams without many issues using a combination of Anking and the popular 3rd party resources (Boards and Beyond, Pathoma, and Sketchy).
2. Mandatory lectures are about 2-5 hours per week. Some weeks are heavier if there's a practical lab, some weeks have nothing at all. Totally manageable and it didn't really affect my studying.
3. You'll have weekly PBLs once you hit the systems blocks. The sessions are on zoom and go for 2 hours after the morning quiz at the end of the week (normally Fridays, but earlier/later on holiday weeks). I personally didn't find them particularly helpful for the material, but it was really nice getting clinical pearls from the preceptors leading the sessions.
