Amazing. Also super interesting to see that when you filter for high speed rail it’s basically Japan, China and Europe. America (north and south), Africa - basically the rest of the world is in dark ages
Washington DC to NYC is comparable.
At night I can legally drive to Amsterdam faster by car. 670km on the Autobahn in 6 hours can be done. Not as comfortable of course, but just to prove the point.
Basically the only stretch where the train to Amsterdam might hit anywhere close to its maximum speed is the 20% of the journey between Berlin and Wolfsburg. And even there it slows down frequently. But you might see it go 250 km/hour for a few minutes.
I took a proper highspeed train from Madrid to Valencia a few years ago. It goes 300km/hour. It leaves Madrid, accelerates. And then a bit over 1.5 hours later you arrive in Valencia. It's about 400km. The train has one stop about mid way. Otherwise, it stays at its maximum speed the whole journey. At that speed, Amsterdam-Berlin should be doable in a bit over 2 hours.