The Diku team are indeed based in Denmark (despite registering their work with the US Copyright Office), and the specifics of copyright law do vary from country to country (as well as from case to case, and - within the US - depending on the laws in the federal circuit). Furthermore, until such time as a license is tested in court, there is no way to know for sure if it will hold up. The best way I can think of is probably to examine other similar cases and see what the outcome was.
However I believe the_logos is more interested in getting a professional outside opinion on how the license is most likely to be interpretted in a court of law. Hopefully he will provide a list of the exact questions asked, so that we can see the context in which they are answered. Unfortunately I still don't believe it will prove a great deal either way - the only way to really know how legally binding the license is is to test it in a court of law.
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