M. -
I get why you are posting this and I do think it IS a fair question, but I must admit that it frustrates me a bit. Not because YOU are asking per se, but because I've seen similar posts on the site a few times and that would seem to indicate that it may be a prevailing thought of parents with only typically-developing children that special needs children are to be...well...shunned. Whether or not that's the case, it can feel that way sometimes. And I'd be lying if I didn't state that it hurts.
Every child has areas of learning where they can improve, not just children with identified special needs. It is a fallacy that special needs preschools are "dumbed down." My son has a special need and my daughter doesn't. They both go to his half typical/half autism preschool where she acts as a peer model. If anything, it's more challenging and the education is better because they have to be more creative and use more specialized science-based curriculum in finding ways to communicate ideas to (all)the kids. My daughter has brought out speech and social skills in kids who need it in her class just by being there and my son has gained skills from typical kids in his class just by watching. But please know that the special needs kids have much to offer the typically developing ones, too. It's not a one-way street. (Not to mention that the hours at my childrens' preschool fit much more conveniently in with a work day.)
My son and daughter and their respective classes benefit from visits from the Occupational Therapist, Speech Therapist, therapy dog and use of the sensory room. (In addition to the music program, librarian and other educational programming that they have.) The typical kids get attention they would likely not get at other preschools. The teacher ratios are terrific, they are specially trained and many are Master's level in the preschool. And my daughter has no idea that her brother or any of the other children are anything other than friends in the class. Just this week, the kids enjoyed an animal presentation, a 100 days celebration and valentines parties in addition to the other things they normally do.
Many special needs children don't have trouble learning things, they simply have issues that make that knowledge difficult to express. Others could be genius-level thinkers who get bored with typical curriculum. A friend's special needs daughter was reading at 18 months on her own. I can't imagine that half-day public school kindergarten holds much mystery for her at this point.
So...I think that the school you are speaking of could be a great experience for your daughter.
Having stated all of that, I really appreciate your willingness to put yourself out there and look at both sides of the coin. As the mom of a child with special needs I feel very protective of him because I know that he's mostly like everyone else, so please understand that I'm not writing this out of anger or blame. I wouldn't trade my son for the world. Would I like it if things were easier for him? Yes, but then he wouldn't be who he is. The progress he's made because of the mixed environment he's been exposed to has been miraculous to us. He's my hero.
Best wishes with your selection. I know it's hard.