Absolutely. Your brain seems to comprehend languages better when you're younger. I live in Quebec (Canada), where the official language is French. They make you take French-only courses for grades 1 and 2 regardless of the language you speak.
As of grade 3, if you're a native English speaker, they let you take what's called "immersion." Basically, half-English and half-French all the way to the end of grade 9, then only one or two courses in French (one being the actual French-language class) up until the completion of grade 12.
The result is that I'm fluently bilingual in both languages, even after years of being in English-only work environments. Meanwhile, I took Spanish for all of middle school. I remember how to introduce myself, state my age, ask for two beers and direction to the library. I also took computer programming in college (it's basically a written language in its own right) and remember NOTHING. Moral of the story: youngest age is best.