The thing is that is is absolutely true. And we're proud of it :3.
Everything more than the nod and a grunt to aknowledge the other is considered unnecessary chit-chat, which is not efficient and thus not german. Proof: Am german
> lives in Germany > freaks out that people say Moin to strangers in the elevator > double freak out when they say bye when leaving the elevator > earbuds are a lifesaver to communicate unwillingness to talk