Well, I pushed the school to give DS8 an achievement test and now we have the results. I wanted it done for two main reasons... the first because I wanted to see where he was scholastically, and also because I was hoping that he would qualify for DYS. Alas, that doesn't seem to be the case. Here are the results:

Brief Achievement- SS 141, GE 10.5

Board Reading- SS 133, GE 9.4
Broad Math- SS 138, GE 6.3
Broad Written Lang- SS 138, GE9.1

Brief Reading- SS 133, GE 9.9
Brief Math- SS 138, GE 6.7
Math Calc Skills- SS 132, GE 5.6
Brief Writing- SS 142, GE 13.0
Written Expression- SS 122, GE 5.9

Letter-word Id- raw 64, SS 129, GE 8.9
Reading Fluency- raw 61, SS 135, GE 8.8
Calculation- raw 21, SS 135, GE 5.9
Math Fluence- raw 65, SS 115, GE 5.0
Spelling- raw 51, SS 149, GE 15.3
Writing Fluency- raw 17, SS 116, GE 4.9
Passage Comprehension- raw 38, SS 130, GE 13.0
Applied Problems- raw 42, SS 130, GE 7.8
Writing Samples- raw 19-C, SS 121, GE 8.0

So this isn't quite enough to qualify for DYS, and that's a bummer, but the bright side is that the school is finally doing more for my son. He's been subject accelerated in math to 5th grade (and is loving it! It's not new, but it's not boring) and also to 5th for reading/language arts. He doesn't want to full grade skip because he likes the kids in his 3rd grade class, and the school doesn't like full skips anyway. This seems to be a good solution for us, and so far is working out.
--side note-- we almost didn't get the 2 grade subject skip because the school was afraid of what they would do with him next year. The school is K-5, so no 6th grade material. I had to beg quietly not to hold him back now because of a bridge we might have to cross in the future. Also, it wasn't the teacher who was interested in seeing what might be the best fit for my son, but the 3-5th Counselor. He arranged testing, met with the other teachers, and advocated for my son. I'm still waiting for the meeting I requested 5 weeks ago with his regular teacher. She seems to be in no hurry. Good thing I didn't hold my breath!