OK, people badmouth Comcast, but this is a pretty good deal. I upgraded my cable modem in 2007 to DOCSIS 2.0 and IPv6 support. It might be time to upgrade to DOCSIS 3.0. I’ll do more testing over the weekend to determine if I really need the upgrade. Note from Comcast and my speedtest.net results below (before resetting the cable modem).
Dear Valued Customer,
Great news! We’ve increased your Internet speed!
We increased the speed of your Performance Internet service by up to 25%! You now have download speeds up to 25 Mbps and upload speeds up to 5 Mbps.