I've taken the train from central Pennsylvania to NYC several times. It's great, but it's also a hike and not something you want to do for anything shorter than a long weekend (4 days is perfect, especially if you can do Fri-Mon as the Sunday train is usually very full). I did it once for a Sat/Sun trip and you just spend too much time on the train watching a movie or staring out the window.
And the train network in germany isn't even very good.
It's all relative :) Coming from Ireland (where intercity is still diesel with max speeds around 160km/h, and average speeds far worse), ICE kind of seems like magic.
Its such a better ride as well- I mean I love getting a nice stretch of open road where you can go 60-80mph and such, but the reality of most travel in the northeast is just traffic and congestion and a lot of paying attention to that dude in the SUV who seems like he wants to jump in your lane without so much as a blinker of warning.
We have massively funded our highways, claim that Amtrak is a suck of taxpayer funds and do the bare minimum for it, and then complain about traffic, it's quite irrational.
If you visit a country that actually invests in train travel you'll see it's a fast, convenient way to get around. The most underrated aspect, IMO, is that it's not a hike: the train stations are slap bang in the middle of every city. That's even true in the US, it's just the rails between the cities that let the whole thing down.
From where in Central PA? It's definitely the fastest way to get into downtown NYC from anywhere between Philly and Harrisburg.
There are lots of places in the US where the train is a huge time sink, it's just that in my experience, getting into NYC is one of the few where it's much faster and more convenient.