Priiak asks an excellent question. Your DC was near the top of the norms for early years (which is the form her age nominally would have placed her on), which could have artificially depressed her highest scores, due to ceiling effects. The recommendation is for above average students in this age group to be assessed using the school age form (which nominally begins from age 7, but does have norms for six-year-olds).

...pronounced like the long vowel and first letter of the alphabet...