yeah, its not really worth doing to lighten an aveo, and its not really worth taking the weight from the front wheels on a fwd car anyhow. But something like a mustang, camaro, etc where the weight difference is like 30-40 lbs (guessing). And probably 10 lbs less than fiberglass.
CF is mean for racing, its just also become a style thing. A carbon fiber race hood for an aveo would weigh like 4 lbs.