This is one of the few times that I don't agree with ANACS. While many of these coins that I have seen show a flat strike in the hair area, I do believe there is some wear. On the reverse, there is definite wear on the eagle. These high relief designs wear differently and a small amount of wear can look like it's more significant than it is. I would have graded it EF40 all day long, but couldn't see going higher than that.
ANACS may have been a little liberal on the grade because many of these have been cleaned and it's not always easy to find one with nice original surfaces. Also, this coin is very popular with collectors. I have noticed that key dates are often graded more liberally by the
TPG's.