yes, that is what I've heard. not if you are NW2, but if you are thinning on top at 20, that means you will have a much rougher time than someone thinning at 35, i've heard.
it is not a definite thing, since hairloss can speed up and slow down, but it is a general trend that the sooner you start loosing it, the stronger it will be.
now that i say that, i wonder if the age theory is a myth. if it is, it is a wide spread one.
the faster you loose your hair at once, the more sensitive it probably is to DHT levels in the follicle. But at the same time, people who start treatment soon after hair loss do better, and I would think people who have a rapid loss would start sooner than people it has been sneaking up on.
so i don't know. if you want a simple, cheap method, buy generic proscar from you local pharmacy and cut it in 4ths. if you want extra stuff, at least and an SOD. I think low dutasteride is best until you grow your hair back, and then you should switch to propecia, to each their own. if you are only a nw1 you don't need that.