When I was visiting France some years back and took the TER train on the way from Paris to Strasbourg (300mi / 500km), and that crawled. On the way back, we took the TGV, which flew.
If you look at booking tickets on SNCF's website, the difference is stark: about 5 hours via the TER, versus a little under 2 hours via the TGV. (From that perspective, it's a little funny to describe the TER as crawling, seeing as that's not meaningfully different from driving that distance.)
There are some portions of Amtrak that have comparable max speeds (notably, the Acela) but even then, the average speeds on those routes are nowhere near 200km/h.
There are of course many benefits to taking even the TER over driving the equivalent distance: you don't have to be laser-focused on driving (especially in a foreign country where you might not speak / read the language or necessarily know the rules of the road), you don't have variation in travel times due to traffic (which, by driving, you would only contribute to), reduced per-passenger emissions, and so forth.
The distance between Paris and Strasbourg is >400km, so even the "slow" connection has an average speed of ~200 km/h. The actual regional train connection (TER) takes nearly 5 hours with plenty of stops in between. Slightly faster non-regional but non-TGV connections only exist on lines that are not served by TGVs.
One took maybe 6 hours. The other 12+ or some such. The 12+ hour took almost the same route, but stopped at every. single. town.
Woe to the person wanting to go from Ottawa to Toronto, and buying the wrong ticket. This is pre-Internet so research was less common and easy, and if you have no idea it could matter...
I recall this being named the "milk run".