Do children in bilingual families start talking later than other kids?

No: A child will learn all language he is exposed to and will understand and speak both if in equal (or close to equal) amounts.

Yes: Sometimes... But exposure to two languages at once will enhance performance in the major language in the long run. I think a bilingual child may take longer to get to "mama gimme cookie" but then a shorter time from that to "could i please have a delicious chocolate chip cookie, mommie dearest?".

Yes: Multilingual children may take a bit longer to form complex sentences but their receptive language skills are right on. It is never that they are "confused", this is a myth. It is simply that they are learning different sounds, different ways to enunciate and processing millions of words. All babies are "pre wired" to learn many languages and it is suggested the best time is before age 3 years.

Yes: The bulilding blocks of multilingual children are consistency and exposure. A tv show in another language will not teach the baby nearly as much as a parent exploring the language and the world attached to it with the baby. Babies are keen listeners and can make out and pick up different sounds. We as adults "tune out" sounds that are linguistically of no use to us.