Earlier quoted context omitted.
I live in Germany, and I'm using online banking with the Commerzbank (normal account), Postbank (savings) and N26 (CC). I've done hundreds of transfers, sent and received. In fact, frequently I transfer money to ny parents, or they to any of my accounts (they use commerzbank or postbank), and usually within of 10 minutes my phone gives me a push notification that the transaction has completed and the money is there.
Interesting. That's definitely not true for my DKB and Sparkasse accounts in Germany.
And often banks have copperations, where, between cooperating banks, transactions already run much faster.