well, i think a better way of approaching this debate is what are the questions associated with said passage. Say if the passage is some long rant about elements on the moon, but a question is the how much will be left of element X after blank period of time? I mean, i hope none of use who have come this far need to read a passage to figure out half lives, just find the table you're looking for and move right along.
I say look at the questions first, then the tables/charts/reactions, to see how intensely you'll have to read the passage. If its dealing with Le Chatelier's principles in the Haber process, you can figure that out easy. If its dealing with intracellular cytokine expression levels in type one versus type two immune reactions, unless you work in a immunoregulatory lab, you might wanna go back and dig out some info from the passage.