Okay, so breaking this down, you would like:

1. math instruction (as opposed to enrichment)
2. from a real person
3. at a challenging level
4. at your son's pace.

Before the meeting, think about which of these items you are willing to compromise on, and which are most important.

Think of alternatives that you and your son would be willing to try if the ideal is not available. Could he use Aleks or EPGY if the "real person" option is not available? Could he be subject accelerated even though the pace might be slow? Could you do afterschool math instruction at home and allow him to do self-paced enrichment projects at school? Could he get pull-out individual instruction once/wk (but not every day)? Could he work with a mentor from the university campus?