I'm a 2L, and I can definitely say that the Socratic Method is not as strict as it was during my 1L year. However, my Civ Pro II class is intermixed with 1Ls and 2Ls, so there is no surprise that this class is the most Socratic of them all. My Con Law class is slightly Socratic (professor specifies anywhere between 2-4 students who will be on call during the day, and those students know beforehand what material for which they're responsible). My Property II class is not Socratic at all.
Also, my peers no longer brief (I never briefed, so nothing has changed there), and they, for the most part, read supplements. We all especially read supplements in Con Law because our casebook is just dreadful and is very difficult to understand. I find that you don't even need to read the casebook in order to do well on exams. The most important thing to remember is to know the BLL and to do practice exams, although I'll admit that I've only done 2 practice exams so far, and that was in my Evidence class last year.