Geez, I can relate to this with my eg/pg 6.5 yr old son. He's in kindergarten too. He spent 5 years, though, in special needs, but over the last year has been in two different private gifted schools - both of which haven't been able to accommodate/accelerate him.
My DS was born with torticollis/hypotonia (trunk - from waist up)/severe plagiocephaly/severe sensory integration/visual processing deficits due to torticollis and uterine constraints during the pregnancy. He had global developmental delays - gross/fine/speech/oral/feeding/vision. He had 5 years of pt/ot; 4 yrs of speech/feeding. Fine motor skills were particularly problematic.
Ds had vision therapy for 2.5 yrs. It took us 6-8 months before we had a flood of results; some results with posture and attention we noticed immediately. When he started vt at 4.5 yrs old, DS was barely scribbling and unable to draw a circle or square, though he knew all his letters/shapes. Since vt, I cannot begin to tell you how far he's advanced with reading, writing, math, etc. Optometrist did warn us that once the neural pathways were unlocked that he would start making some great leaps in learning - still some attentional issues though.
DS got tested with WPSSI last summer at 5.5 years old. The test results came back too scattered and inconsistent. Neuropsych said he had ADD/ADHD and possible Asperger's, but nothing about giftedness though he went through a private gifted school's pre-k/k/1st grade curriculum in 2 1/2 months.
OT evals have come back saying that his muscle tone is now at the low end of the normal range, though he can tire quickly with tests/writing/strenuous activities at times. OT says sensory issues are now in the mild-moderate and therefore doesn't qualify for services.
Agree medical profession is generally clueless on hypotonia and a lot of special needs/2e kids. Not sure if you're going to get any results from teachers.
I'm in the process of seeing Dr. Lovecky, who wrote Different Minds, to get some answers. Not sure where you live, but is there someone you can see for more expertise on 2e? I would suggest it. I've found many therapists, evaluators, and teachers are pretty clueless on how to deal with 2e issues and my DS.