Anyone using Roadrunner......Do NOT buy your own modem just so they can shove their new modem rental fee up their anus. My speed was usually 30 mbps until I got my own modem. That brought me to their attention and I am stuck at precisely 16 mbps all the time.
It's their Turbo option. I also have a gigabit speed router with cat6 cable. Computer is probably about as fast as a home build can get also with dual ethernet ports.
It's a temporary upgrade for me. Last year I used their lite version, about 1.2 mb down. 0.5 up