Hubbert is wrong, in the real world Gigabit ethernet will transfer files about twice as fast as the HDD can read them off the platter.

An SSD should be about twice as fast. Gigabit Ethernet can transfer about 108MB/s ( I got this with a networked MacMini with internal SSD) Whereas my iMac's internal HDD can only manage about 58MB/s transferring data to my internal SSD. In the real world HDDs are about half the speed of Gigabit Ethernet. The SATA interface is quick but it still has to find the data on a spinning platter before it can blast it over at 6Gbps. Also faster seek times will make the SSD seem a lot more responsive.