Check out this tweet from Luke Holder.
networkQuality -v in the terminal.
My Fios gigabit internet is certainl;y not quite gigabit, but decent enough.
Upload capacity: 603.014 Mbps
Download capacity: 538.738 Mbps
Upload flows: 20
Download flows: 16
Responsiveness: High (5647 RPM)
Base RTT: 4