Heh, maybe. We tried teaching both my kids ASL at 6 months. The first one managed to get four of five signs before she could talk. The second one has zero, but then again, he doesn't really talk yet either.
Do second kids typically start talking later? I have two separate friends with two kids each. Both their oldest kids learned to talk pretty early, their second in both cases were much later.
My anecdata agrees. My brother in law's first two kids were born 11 months apart so their developmental stages were pretty synced up, but their third definitely took a lot longer to start talking. His older brothers just spoke for him and understood what he wanted without him having to speak, so he didn't.
My daughter learned to talk a lot earlier than her older sister who is a year older, also learned to walk earlier too. Anecdotal, obviously, but part of me thinks she was trying to "keep up."
