The commercial breaks are when I usually skim read through the GDT. Im much too stupid to be able to follow the thread and enjoy the game at the same time, so thats when I try and participate in it.
Sometimes when there is a play review they kind of split the screen with the game in one square and the commercial in the other. I wish they would do that more often. At the end of the day the NFL is a business. They are here to make money just like any other business. They use to cut to commercial after a score and then again after the kickoff. At least now they just do one break after the kickoff.