I also don't believe that it is necessarily true. Usually people say that you will be +/-2 pts from your AAMC average, but for me my actual score was 4 pts higher. The test usually just feels harder because of the situation, but that feeling isn't necessarily the right one; for example I almost voided because I thought I did so poor-the only reason I didnt was that I had driven 500 miles to take my test and didnt want it to be a waste.