The FCC has defined broadband as 25/3 Mbps since 2015. Prior to that it was 4/1 Mbps. The first FCC definition of broadband was established in 1996 as 200/200 Kbps. You can't really play loosey goosey with the definition. The service is either fast enough to be considered broadband or it isn't. The delivery method is irrelevant.