Mr W gets Spanish during the day from the sitter and English from us at night and both together from us on the weekends. We read him books in both.
Before the sitter came at 5 months, he was saying a lot of English words. At 6 mos he stopped being verbal and got pretty quiet except for repeating words in either language he did not know. On occasion, he would ask specific questions like "What is a Mercedes?" Lately he has added adverbs, "Daddy don't go away no more!"
He can follow complex instructions in both languages and can understand TV in both.
I think that had we stuck to English only, he would be more verbal than he is. When confronted with complexity, he becomes cautious and will not act until he understands things.
