Hi Dottie,
We did do WIAT when he was 4.10. (These were both done for entry into a gifted school). We were not able to get composite scores for that either (except for Word Reading and the Oral Language section). We have AE and GE for most all. I will provide here in case you can offer something by way of what the scaled scores would be if he was older. The psychologist mentioned in her report she gave him subtests that are not traditionally given at his age.

In Reading:
Word Reading: - 160 - 9.0 and 3.6
Reading Comprehension - 9.8 and 4.4
Pseudoword Decoding - 13.4 and 4.6

In Math:
Numerical Operation - 8.0 and 3.0
Math Reasoning - 8.4 and 2.9

In Writing:
Spelling - 7.9 and 2.2
Written Expression 6.4 and 1.5

In Oral Language we did get a composite of 137
Listening comprehension was 139 6.0 and 3.5
Oral Expression was 119 - 9.0 and 1.7 (This seems off-base to me)
The Psychologist wrote that "his Oral Expression and Writing, while above the level expected for his age, could cause him difficulty in an accelerated program. These areas of lower functioning appear to reflect his age appropriate motor skills and brain development rather than areas of learning deficit and are likely to be as well developed as his other skills as his brain continues to mature and he is exposed to more experience
and information."

Thanks