Switzerland has the best rail system in the world (IMHO). One app can manage ticketing across all public transit in the entire country, and it is extremely fast and reliable. Lots of people who work in Zürich, for example, commute in from Zug (due to lower taxes in the neighboring canton).
It's generally called "as fast as necessary", more focused on total journey lenght with the clock-face schedule across the whole country. Other countries certainly have faster trains.
I guess "fast" is what I mean when I think "on time, efficient" (compared to, say, the struggles Deutsche Bahn has had in recent years). There are no bullet trains laterally crossing Switzerland in under an hour, I suppose.
it's nit-picky, but I think the swiss approach of "as fast as necessary, not as fast as possible" is worth separation from "train go fast", especially since it's mostly the later that shows up in comparisions/statistics because it's much easier to calculate.
