An update: I couldn't really check things numerous times this morning, but I've ridden the Waterloo spur section a few more times this afternoon (after the climate strike). Of the 6 trips I took, only one operated above 60 km/h. While trains may have permission to travel faster, I'm assuming trains are not running at the faster speeds to avoid scheduling conflicts. If this is the case, we won't see any real changes to the line's operation until the holidays or later. It's a shame because riding the train when it's going 70 is a lot more fun.