I did a survey in my OChem-2 class (big-10 university) with the help of the instructor who was interested in the results. Of the 139 pre-med students, all participated in the survey and only 2 had even heard of SDN. No one had posted here and the teacher and I believe they are telling the truth. We polled them on 20 different questions to disguise my real interest in SDN. My reason for doing the survey was that I had become suspicious when I noticed that most people who posted in the 30+ MCAT thread had only 1, 2, 3 or few posts. Could TPR, Kaplan and others be merely trolling in the 30+ MCAT thread with an intent of promoting their products? Or do you think it is the work of SDN insiders, who as someone posted might be the #1 mass trolls? Could the rest of you also survey your classmates and find out if people even know about SDN? Ask like 20+ assorted questions and let the SDN question be just one of them. SDN usership is almost nil at my university (big-10). I am curious what your survey might show.