Just read an article in Training & Condtioning Mag where a S&C coach mentioned leg training for female athletes. His protocol for women is different than men because of the cultural bias against thick legs for women.
From my experience, functional exercise doesn't do this. It's the traditional bodybuilding isolation machines that hypertrophy the legs. The worst is probably the hip sled/leg press.
The only other exception would be Weight and Power lifters who spend an extrodinary time with very heavy weights doing deep squats.