Auntie, a question.

Background:  DS, 5 at the end of this month, has many red flags for Aspergers (yes, I know that it doesn't officially exist any more) but hasn't yet been evaluated. Soon, hopefully.  Soon.

Anyway, we've been having problems with him not wanting to go to school since November.   I've never been able to get a real answer out of him about why he doesn't like it.  He loves his teachers, is generally thriving in the structured classroom (much better than the chaos of his class last year), and comes home excited to replay the day for me.  But, every morning he doesn't want to go.  Finally, he told me that it's because they do too many crafts and that they have to stand up for them and he wants to sit down.

I don't know if this is something that I should seriously consider as a reason or not.  (Keep in mind that his reasons have been quite varied for many months.)  I know that kids on the spectrum can have core weaknesses that cause them to get tired more easily. But, he has always been very physically adept.  He can't do a situp (is that something he should be able to do at this age?) but has been riding a bike without training wheels for a year.  He walked at 10 months, sat at 3 months, and crawled at 7.  Compared to his peers, he seems kind of strong in general.  At least, he knows how to throw his 36 lbs around in just the right way to do things they can't, at much larger sizes.

Does it sound likely that this is a real reason?  Are there any little tests I can do to find out?  I don't want to bother his teacher with it if it's just another excuse.  It's just the first one that actually sounds real.