I don't think the movies were americanized. How could they be?, with a whole british cast, filmed in scotland was it?. No i disagree with this person. I haven't seen any movies directed by Alan Parker so i can't say if he would have good or bad for the Potter movies.
The movies were very cute, i think, but the first two books are the lighter books on the series. Actually i think Columbus did a great job with CoS, and PS was very good too. The movies were cute, anyone knows Columbus makes cute movies, but i don't think he americanized them.