Yes, a subtest. But never a RIT score. NWEA insists it is possible, but I've seen hundreds of reports at this point, including some from very advanced DYS kids. (I am writing a document for our school for teachers to better use RIT scores to inform their teaching.)
If you look at something like this- https://docs.google.com/viewer?url=http%3A%2F%2Fwww.powayusd.com%2Fprojects%2Fedtechcentral%2Fmaps%2FPDFs%2FCorrelation%2F12-13CorrelationFinal%2FK-5CorrelationChart12-13final.pdf
and this-
You can see that even this district's GATE students aren't scoring that high in math
https://docs.google.com/viewer?url=http%3A%2F%2Fwww.powayusd.com%2Fprojects%2Fedtechcentral%2Fmaps%2FPDFs%2FCorrelation%2F12-13CorrelationFinal%2F6-9CorrelationChart12-13final.pdf
Essentially, from all I've studied about NWEA, the RIT scale is continuous- meaning you can compare score to score to show an individual student's growth. But the tests, particularly when comparing the primary to the 6+, are simply too different (both in types of questions and format) to really know how a kid would actually do. NWEA says the question bank is the same but I've messed with it enough to know this isn't true.
