It depends why you are eating. Are you eating because you are just hungry and you are on the go. Fast food places are everywhere and they are doing very well. Or, maybe eating is an experience you like to savor. Say, a romantic dinner. Then, there is lots in between.

To go back to reading. If your goal it just acquire the information, well then reading=fast food perhaps (Well, I am not sure if reading fast solves the problem because the bottle-neck could be comprehension not the speed of reading the words). Or are you reading a novel on a vacation or poetry and enjoy slowly taking it in.