This is the mail I sent to IMDB
Hi,
i'm a big fan of IMDB and I know how your "weighted average" works.(excuse me for my english)
But, in the case of "This Is It" (MJ), there's still something wrong...
How do I know that ?
On boxofficemojo, the film is rated B (540 votes) and it's now the 28th of the year on the BOM grade chart.
http://www.boxofficemojo.com/movies/?id=michaeljacksonthisisit.htm
90 % of the "Rottentomatoes Community" critics are "fresh" ! The average rating is 8,3/10 !!! (1 000 votes)
http://uk.rottentomatoes.com/m/michael_jackson_this_is_it/reviews_users.php
on Rottentomatoes, for professional critics, it's 80 % fresh ! It's rated 7,1/10 by professionnals and the most famous critics in the world give at least a 4/5.
http://uk.rottentomatoes.com/m/michael_jackson_this_is_it/?name_order=asc
on Yahoo Movies, the film is rated "A" after 8000 votes.
http://movies.yahoo.com/movie/1810109568/info
On Metacritic, it goes the same with professionalls and better with Ordinary moviegoers (7,6/10)
http://www.metacritic.com/film/titles/thisisit
Any other Movie with this kind of ratings on these sites would go the same or higher on IMDB.
When you look at the demographic breakdowns on imdb, you will notice how weird the ratings goes...there are fan and haters obviously but the "haters" seem to win the party since the movie is not rated as good as it should be regarding other famous ratings on other sites.
I know i won't change anything to the rating system which works well on IMDB usually but, this Time, and only this time, there's something wrong....Don't you think ? I'm not saying the Movie should be rated 8 or 9...but 7,4 is obviously underrating it...
As a fan of IMDB and as Film lover, I had to tell you this.
Demogreaphic Breakdown of This Is It
Arithmetic mean = 7.9. Median = 9
Votes Percentage Rating
4,583 45.0% 10
1,277 12.5% 9
1,484 14.6% 8
938 9.2% 7
374 3.7% 6
173 1.7% 5
93 0.9% 4
98 1.0% 3
130 1.3% 2
1,032 10.1% 1
http://www.imdb.com/title/tt1477715/