I have a 15″ Macbook Pro unibody for work. Recently I was looking at the hard drive specs as I needed to upgrade another users laptop. Turns out that the SATA controller is capable of 3Gbps, however the drive from Apple is only capable of 1.5Gbps. What’s really annoying about this is that I specifically requested a 7200RPM drive from Apple to get some extra performance. Granted that the interface usually isn’t the bottleneck here, but still it’s annoying.