L25N is 17.6 km long, and as far as I can see top speed is 160 km/h now, so I didn't expect a lot of time gains. Yet, on the Thalys, four minutes were cut, from 39 to 35. They used it to add a two-minute buffer time to Paris-Brussels times, a one-minute buffer to the Antwerp-Rotterdam time, and also extended the stopping time in Antwerp by one minute. There is no time gain on Brussels-Antwerp IC trains, but the new direct trains between Antwerp and Brussels airport cut at least 20 minutes.

_{*Lunatic*, n.
One whose delusions are out of fashion.}