I agree totally, since language development at this stage is so very important. I wish there could at the very least be dedicated programs for Deaf childern within general schools (such as a dedicated wing with bilingual ASL/English teaching) but, unfortunately, the Least Restrictive Environment clause applies to Deaf children and we are forced at schools here in Texas to place Deaf children into general education classrooms with no regard for whether this is the best choice for their development. It's what happens when legislation decides in one broad stroke what sort of education our children have, despite not being the ones on the front line (the ones who actually work with kids and know their needs). Instead they often find themselves in self-contained PPCD (Preschool Programs for Children with Disabilities), where the majority of the students are autistic, intellectually disabled, or emotionally disturbed. They then graduate Pre-K far behind the general population because instruction was slowed for their fellow students.
The best answer? Deaf pre-schools. The best monetarily feasible answer? A special program within a larger school just for Deaf students. The answer that complies with No Child Left Behind? If in a normal, public school they must be in general ed classes with hearing students or in a PPCD class with special needs students, depending on their evaluation. And trust me--as a special needs teacher I am tired of seeing kids in my program who are there simply because they were placed in the wrong program as a very young child and have been exposed to only below grade level material ever since.
NOTE: Least Restrictive Environment is a US law that state a student with a disability MUST be in the general education population if even feasibly possible so that special needs kids don't get stuffed in a closet somewhere and forgotten. Unfortunately, it also limits opportunities for Deaf children to enjoy a public school environment taught in native ASL where they can communicate easily with their peers and teacher without a third party interpreting.