Score on PsychPrep E - 70, although I took it when I was exhausted
Score on TSM practice tests - varied between 73 and 80
Score on AATBS - hovered between 60 and 70
Score on the practice test you can order online from the EPPP people - 74
Actual score - close, but higher than highest TSM score
Time to receive scores - 26 days
Study time - about three months
GLAD IT'S OVER! If you're using TSM, that was the test that had the most predictive value for me and I felt had questions that were closest to what I actually saw on the exam. I think AATBS is a nerve-racking waste of time; I could have taken the test I think months before I actually took it but was freaked out by how poorly I did on those. I say scrap those and go with PsychPrep or TSM. I was lucky enough to get TSM paid for though my job, but I think it's worth it either way because it's well organized and easy to work though, and easy to see where your status is. It's even a bit fun, because of the web interface and the quiz questions. The cost in its own way, if it gets you to pass, is worth it because you'll end up paying that much to retake the exam.
good luck everyone!