Those times are long gone. To be fair, the german train system is huge and horribly intricate, and budged cuts have left DB with dangerously little buffer overhead to compensate for mishaps. So delays of a quarter hour or so are frequent nowadays. Still, one can travel more or less reliably.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition