A friend of mine used Hyperlearning; he found some parts to be challenging, others to be easy. I remember he was a little worried about it being so hard (like you guys) at one point. Try seeing how you do on a practice test and comparing how you felt about the problems.
I suspect there haven't been any huge changes to the Hyperlearning book over that time. I can't say that with any specific knowledge, but the fact is the MCAT hasn't changed in any HUGE ways since that time.