I have an up-to-400Mbps plan with Xfinity and when I run an Ooku speedtest I am only clocking in at about 100 Mbps with a direct ethernet connection. Xfinity sent me an email recommending I upgrade to a modem capable of faster speeds in order to improve my service, however I am not sure if the modem is necessarily the culprit as my old Netgear CM500-100NAS is still capable of up to 370 Mbps. The math doesn't seem to pencil out but is there something I might be missing?