I'm betting it's a combination of both. Students must realize that the school provides the foundation for board study, but it's up to the student to really ace the material beyond what is required on class. I've heard of students who make all A's in their classes, but have trouble with boards. Also, students who make almost all C's who ace the boards. For me, I made pretty much all B's last semester, and did pretty well on the board prep exams. I place an emphasis on board study when I am studying for class (practice questions, etc).
The curriculum has been overhauled, and an increase in board scores may not be seen until the current second and first years go through. But I haven't gotten the board scores yet... So maybe they have increased. But I'm guessing if it was significant, we would have been told.
Don't let that discourage you though. I think the school is really working hard to make sure we do better. But like I said, the responsibility is really on the individual student.
I don't know anything about boot camp. A second year will have to answer that.