Princeton Review pre-test?

Tomorrow I begin SAT review classes, and it starts with a 4 hour pre-test on a Saturday morning. (Yay). Now, I have not prepared for this in any way, shape or form, because, after all, that's what I'm paying them to do. However, I have no doubt that the results of this pre-test will be used as a comparison to the final result to demonstrate my INCREDIBLY improvement as per their improvement guarantee. Obviously no preparation compared to a month of preparation is going to result in vastly different results. So this leads me to my question, should I do some quick studying, and will they actually use the pre-test?