Even the Justice League has a strange change and stories that would come from an anime.
Most definatly american toons have been altered by anime and beleieve it's because they recoginize that many people here in america do like anime. i mean pokemon and yu-gi-oh have taken the place of shows like spiderman and animaniaics, and Cartoon network keeps getting more and more anime-based shows besides just on toonami and adult swim. American artists are just trying to stick with the "fad" if you will, keep the viewers happy.
The only american cartoons that really beat anime, are the pixar films.