The school psych is a phd and the reason for the delay with the WISC was actually in response to me asking about the writing portion of it, basically rather than doing it now, waiting till he is a bit more comfortable so not so pokey. That being said, my sense is that she might be more used to MGs based on her comments and I don't get a good sense yet that the school is flexible, but I haven't pressed either.
DeHe, with a PhD school psych and a general willingness there to work with you, I'd say do it. You're at the beginning of a long journey in any case; getting it done through school will give you a baseline of information you're going to refine later anyway.
DeeDee