Saying that Einstein was "recognized as crazy fag" implies that he was actually one -- which I strongly doubt is the case. Regardless, his 1905 paper on special relativity and his subsequent work (mostly performed within the next 5 years) fleshed out the vast bulk of his theory, and it remained virtually unchanged henceforth. The 20 years you refer to is mostly the time it took for experimental physics to catch up, and be able to experimentally verify the many consequences of his theory. Also, it is somewhat immaterial how long it took for him to be "nominated as genious [sic]" -- the fact that he was indeed correct in all the major components of his theory, a theory which broke so completely with most of physics prior to him, is evidence enough of his genius (which is not to discount Lorentz or Poincare in any way, who were certainly almost there as well).
With regards to your second paragraph (and your prior comment about scientists having to be >30 to be recognized as such and >50 (!) to become one in Russia), the evidence of the works produced by great scientists in the past hundred years strongly suggests that there is something wrong with that belief. Looking only at mathematics, for example, it is difficult to argue that Ramanujan, Godel, Hilbert, Grothendieck, Weil, Weyl, or Deligne (to name only a few), were not truly scientists before age 30 (by which time most of them had published some of their best works).
If the value of science is indeed going down in the US (a fact which is not at all clear to me), then there are lots of other possible reasons for it. But certainly not age.
With regards to your second paragraph (and your prior comment about scientists having to be >30 to be recognized as such and >50 (!) to become one in Russia), the evidence of the works produced by great scientists in the past hundred years strongly suggests that there is something wrong with that belief. Looking only at mathematics, for example, it is difficult to argue that Ramanujan, Godel, Hilbert, Grothendieck, Weil, Weyl, or Deligne (to name only a few), were not truly scientists before age 30 (by which time most of them had published some of their best works).
If the value of science is indeed going down in the US (a fact which is not at all clear to me), then there are lots of other possible reasons for it. But certainly not age.