<p>I don’t know about professional schools, which, I understand, are more stats -driven than grad schools-- but grad school admissions vary enormously in the emphasis that is placed on standardized testing. Some departments and some individuals may put lots of emphasis on standardized test scores, others very little. Since most admissions are handled at the departmental level, the personal perspectives of individual members of admissions committees also play a large role. GREs test scores may be the first of the last thing that a reader looks at.</p>