Interesting - DD took version 6/2, along with the entire 2nd grade. She was also 7. Perhaps 6/A is where it turns into a written test? Sorry if I missed this, but did you ask about age-norming? The CogAt composite that is used along with other tests by our school to determine whether a child gets into the pool (and is then eligible for MORE testing to determine if eligible for G&T) was age-normed. DD is young for her grade and this was the first time I've seen something age-normed versus grade-normed. NWEA/MAP appears to be only grade-normed for us. Although DD's CogAt composite was identical, some of her subtest percentile scores are higher when age-normed versus grade-normed. If your DD's scores were age-normed, they would also likely be higher.
I think that an SAS of 139 is 99%. I believe 99% starts at 135. 135-150 is a huge range...so SAS scores give more precise information than mere percentiles.