My kid recently moved apartments from one served only by Comcast to one not served by Comcast. He filed the cancel request online and took his cable modem to a Comcast office in a nearby mall. The cancel process took about six minutes total; nobody called to beg for him to stay or stall him on the phone for over an hour.

My view is that the indication is how a company treats you when you leave versus when you arrive and, at least this once, Comcast did well on both.