That's not how it works though. The International Telecommunication Union's definition is relevant here. For instance, in 2010, it was: "[...]downstream speeds equal to, or greater than, 256 kbit/s...".[1]

There was also talk about increasing it to 2 Mbit/s some years ago.[2]

Not that that change would make a difference if you look at broadband accessibility for Germany here.[3]

Point is: What was written was a load of bollocks. There were no facts to back up the statement but people lapped it up anyway.

[1] https://www.itu.int/ITU-D/ict/material/TelecomICT_Indicators...

[2] https://www.itu.int/en/ITU-T/committees/scv/Documents/T17-SC...

[3] https://www.bmvi.de/DE/Themen/Digitales/Breitbandausbau/Brei...