Sorry for the LONG delay in responding. My daughter is almost 18 and soon to leave for college. She has been in very good health and very active. She has lettered in swimming all 4 years of high school and plans to compete in college as long as she is able.
As to the question by meNdanny - there are some mutations of the CF gene that are less serious, but the delta-508 and I509 are not among those. Many, many things affect disease progression. Genetics is part of it (both the specific CF gene and modifier genes). "Luck" is part of it - what bacteria you happen to be exposed to. But of the things we can control, I think three things are key: nutrition, being rigorous in following treatment, and basic sanitary precautions (e.g., people with CF should be careful of the possibility of cross contamination). We've been fortunate - only one hospitalization so far - but we know things can take a turn for the worse at any time, and we don't have any illusions about the long term prognosis. But, we live every day to the full, make treatments part of the routine, and keep things in perspective.