I've had terrible experience with intercities train with delays that were more than 25% of the length of the trip. Once I was waiting for a train that was an hour late. The next train on the same line even arrived before the train I was waiting.

I've traveled in a lot of countries and used train in a lot of them, none of them have been quite as bad as DB when it comes to reliability.

And the recent articles that claim only around 60% of trains arrive on time bears that.