I had one professor who provided us the past 10 exams and a sample student answer for each of these. In one, the student went with some sort of modified txt speech. For me, it was really grating to read, but presumably he or she did well because it's used as a sample answer.
And you're wrong if you think everyone seems the same issues. In a general law school exam with a fairly standard fact pattern, no one is going to get all of the issues. No one. Whether that's remotely important or not will vary on the professor and exam type.