Today german newspaper 'Sueddeutsche Zeitung (SZ)' reported that more and more trains of DB arrive behind schedule. At the moment at least 1 out of 4 trains arrives late due to construction work, ramshackle tracks and logistical problems. Particularly the "ICE Sprinter" trains arrive behind schedule quite often
DB's plan is to have a punctuality of 86% but it is now below 80% so far this year. So be careful when planing a trip with DB and don't expect to arrive on time.
But to mention some good news as well: on my last trips service increased at least in 1st class.
Cheers
totti