I was just researching this question this morning because I've taken one full length and will take another tomorrow. Today I scored significantly lower on both gen chem and o chem than I have been on bootcamp. What I found was that most people that did Kaplan scored significantly higher on the real DAT than they did on their full lengths at least for the science sections, but I don't have firsthand experience with the real DAT yet. Look forward to others weighing in on this thread.
