I called apple support to check up on it. It really doesn't matter. The late '08 model had a faster bus speed in the new hard drives. So if they would have left the existing hard drive in the new macbook it would in fact run faster. I don't know, this just bugs me. They could have told me that they were going to put my old hard drive in my new macbook.. arrrgghh.. I guess it's not worth making another trip and it runs great anyway