I have a MBP from August 2007. I've noticed my USB speeds are very sluggish. I have a particular USB key (Cruzer) that just chugs. It can take me 5-10 minutes to put a large file on it that can be extracted off the same key on a different machine at easily half the speed. And its not just that one USB stick, all things run slow through BOTH of my USB ports. Anything I should look at short of taking it to a genius?