Yes and No
What Bracken has said is true however do not expect to get transfer times of 480Mbps, 400Mbps or 3000Mbps as at the end of the day the hard drive in these units are 99% of the time standard 7200rpm drives.
This is where the bottleneck comes from as most 7200RPM drives you will be luck to get 70Mbps out of them.
So in reality the difference is so minimal that you or i would probably never notice the difference.
The Hard drive has always been one of the worst bottlenecks within a computer hence the release of SSD (Solid State Drives) which are basically big memory sticks.
Hope this helps