But with all these ideas, bottom line on the research says that children who feel connected and attached to their teachers are the most successful, disregarding all the other things, especially through the toddler and early preschool years (through age 3).
That one you'll probably feel with your intuitive emotional mama/daddy brain, not the analytical part that takes notes on all these other things.
There are other resources, but this is one:
http://www.zerotothree.org/public-policy/state-community-policy/nitcci/multidisciplinary-consultant-module-1.pdf
So when you find the place that feels right to you, let that feeling be part of your research too.