Naming a few great goaltenders that have had good years beyond the age of 35, doesn't make it the norm. There are always outliers. Jagr is 45 years old, and still putting up great numbers. Again, an outlier, not the norm. On average, goaltenders prime years are likely a little later than defensemen, just as defensemen are a little later than forwards, but they do still have a peak, and if Howard hasn't hit his yet (I think he has), he will very soon. Mrazek's prime years should begin this season or next, and if he is truly as good as he has shown in some of the short stints, he should be a very good goaltender for another 5-10 years.