My own kiddo, who is in DYS, didn't get DYS level scores on Explore (though if he hadn't skipped a grade, he would have qualified this year). The Explore is a timed test, and if you don't have a fast test taker, then you won't get full information out of the test. My DS9 said he didn't finish any of the sections.
If you are looking for information about whether your child is underchallenged, we got a lot more information from individual IQ testing than from Explore. The scores and the detailed report we got from the tester who specialized in testing GT kids helped us to advocate in the schools. Different schools will look at IQ and Explore scores differently, though. For some schools, it's very impressive to see that a 5th grader did better than 90% of 8th graders on Explore, e.g. But some schools will not be familiar with Explore, and so not as useful. IQ scores are similar - most teachers won't know what to make of them. The report we got from the tester was more influential, as it gave detailed explanation about how different a learner our kid is.
