Sign language waste of time?

Sofi just learned how to say "more" yesterday. She's only been signing "more" for a month or two (guess I never wrote in the blog when she learned that one), so it almost seems like trying to teach her sign language was a waste. But it's not, really...the way she says "more" sounds like "mohhhhh" so it's good that she's got the hand gesture to make it clear.