L.C.
Hi H.. Your daughter's speech will all depend on where she is on the spectrum. The fact that she is starting to sign is deffinitely a step in the right direction. She is learning that she can communicate with words. Another program used by kids with communication disorders is the Pictrue Exchange Program (PEP). The child shows pictures or chooses pictures based on their wants/needs or in response to a question. This is another great way to encourage speaking. We are currently signing and using PEP with my son with Downs.
I have two friends with autistic children that both speak. The one didn't speak until she was 5. She signed for three years before she actually talked. She's now has quite a vocabulary, has learned to write words and read. She's only 6 1/2. My other friend's son is now 13 y.o. and he talks all the time - not always appropriate for the situation, but he talks all the time.
L.