Does it matter who we sign up for testing with? The Duke TIP program is the one actually used for our state, but they don't offer the Explore until 4th grade, so we were looking at going through Northwestern - NUMATS. They offer the test to 3rd graders and they have a test center about 2 hours from where we live. Does it matter which we use for the test and does the test results transfer between Duke and Northwestern and so on?