German Internet Speed Check: "Der Breitband-Test"

Because of some regulations (look here) and because of too many broadband access providers selling bandwidths they cannot provide, there is a investigation started by the Bundesnetzagentur. Every customer can start a test and at the end of the year the result will be published.
So if you think your bandwidth is lower than it should (and you live in Germany), try this test and provide some data...