In one aspect, a method includes identifying a group of content-presentation devices that are each tuned to a same first channel and identifying, from the group, (i) a first sub-group of content-presentation devices that each have a respective content-transmission delay that is lower than a threshold delay and (ii) a second sub-group of content-presentation devices that each have a respective content-transmission delay that is greater than or equal to the threshold delay. The method also includes determining that within a predefined time-period, at least a threshold number of content-presentation devices of the first sub-group have changed from the first channel to a same second channel. The method also includes in response to the determining, storing an indication that the second channel is a priority channel for use in performing channel identification when a content-presentation device of the second sub-group has changed channels from the first channel to a new channel.