World Broadband Performance Map
Measurement Lab have provided Google's Public Data Explorer with two year's worth of global internet speeds.
Using the data you can compare the download & upload speeds in different countries. You can view the data in a number of formats including graphs and pie charts. Thankfully you can also view the data geographically via Google Maps.
Using the Google Maps tool you can compare any combination of countries. For example you can see how download speeds in the U.S. compare with the Netherlands, Denmark and Norway (very poorly BTW).
The map also comes with an animated time-line tool so that you can see how speeds have risen or fallen worldwide over the two years that the data is available for.