Yep, latency's also big if you play competitive multiplayer games. With DOCSIS you get ~11ms +- 3ms added to every packet no matter what because it's shoehorned existing cable infrastructure. Fiber is much better in this regard.

Ping to my public IP's gateway address:

  30 packets transmitted, 30 received, 0% packet loss, time 29031ms
  rtt min/avg/max/mdev = 1.449/1.915/2.212/0.166 ms