That sounds quite reasonable. Dd#1 took the Explore in 4th & did very well on science & english, okay on reading, and not too well on math. She was really thrown for a loop by it being hard & left the reading test twice to go to the bathroom & cry, so I don't suspect that it was her best showing.

None the less, she didn't do nearly as well as your dd and she did skip 5th quite successfully. She was still advanced on all of the grade level tests and in the 99th percentile on the SRI lexile for 6th grade post-skip. Overall, I'd say that she is still a very strong student post-skip. It sounds like your dd would be a great student still post-skip.

Study Strategies for Accelerated Learners