When it comes to Internet access, not all plans are created equal. The data transfer speeds vary greatly around the world, as does the cost for basic access. As you can see, in Japan Internet speeds are blazing fast and cheap compared to those less fortunate users in other countries. In the United States, Internet users pay more for way less, but are still better off than users in Greece who connect at the slowest speeds in the world.
Source : http://www.billshrink.com