"GenealogyInTime™ magazine has put together a global list of the Top 100 Most Popular Genealogy Websites. This is the first time a comprehensive list has been published of the most popular genealogy websites from around the world. Other genealogy lists exist, but they tend to focus on only one country, on only certain types of genealogy websites, or the list contains personal preferences."
Some Top 100 lists leave me doubtful, but this one seems well researched, based on Alexa rankings. I see that FamilySearch.org is rated as #3, which is probably right. I want to check out some more of these sites.
A shortened version of the URL is: http://goo.gl/1WLhx