Quite puzzled as to how it got in to IMDb top 20

Rating: 5/10 (23 November 2009)

This movie being in IMDb top 20 puzzles me somewhat. I have seen most of the IMDb top 20 movies and they lived up to my expectations or exceeded expectations apart from perhaps The Dark Knight, Star Wars, and Lord of the ring. Those movies are up there understandably due the votes of the huge fan base. But how did Rear Window got up there? Due to the fan base of Hitchcock? Probably... and may be also due to the fact this is a pioneering movie of its genre. I can try and agree with reasons given by reviewers who has given very high rating for this movie. However, the whole package is bit disappointing, specially when you put this movie in current context. I cannot agree that this is a timeless classic. Anyway, you have to put my rating of 5 in context as well. I am rating it for the entertainment value forgetting about the fact that Hitchcock did this movie in 1954 and he was a pioneer of the genre.