Rebranding
There's a problem with "Super fast" and "Fibre" because they get misused. There's also a problem with using more accurate terminology like "Crappy Speeds." So they need to rebrand. Something that makes it seem like more than it is without actually contravening "passing off" laws.
I suggest, "I can't believe it's not fast."
Yeah, I stole that idea. Can't remember where from, though. :)