I have not conducted any sort or scientific experiment nor am I anywhere near an analytical person. It just seems that Comcast will randomly select channels on their own. When I turn off the tv on a certain channel, and when I turn it back on after an extended amount of time, it is a different channel. I know that some will say that it is recording or recommending channels based on my past viewing. I do not believe this. The channels appear to always be very large networks that I do not watch, and the recommended recordings are never from these mainstream large network channels that always show up when I turn on the tv. I hope I am making a small amount of sense!