No need to Google:
The full list of items compiled by the community this year was generated in the thread promoted for the purpose on CGTalk. The CG Top 20 list is a result of public voting in that thread which was open for a month, from the 4th November through til the 12th December. If an item is not on the list, it wasn't suggested by the thousands of people who viewed that thread.
As the process of compiling and voting was public, there was and is no conspiracy or bias from the CGSociety towards any items listed in this year's Top 20.
Quoted from here