Certain departments don't even require the GRE. For instance, the philosophy grad program at MIT doesn't require it, which is pretty surprising. Even at some places where it is required, grad admissions committees might not take it very seriously. Opinions on the usefulness of the GRE vary across admissions committees and individuals. I can imagine the math section being useful for mathematics and physics departments for weeding out weak applicants, but then one might wonder whether math weakness wouldn't simply be reflected in the student's undergrad GPA for these kinds of majors. Certain parts of the verbal section I can imagine being a somewhat useful measure of something, but that section is HIGHLY FLAWED. I find the test useless for the most part.