When is 'terahertz' RF not actually 'terahertz' RF?

I keep seeing marketing nonsense from big RF companies talking about their terahertz RF systems. Or 'terahertz' domain something something...

When you look at it they mean approx. 150-300GHz.

That's about a fifth of a terahertz...come back when you can actually hit 1THz and I'll be impressed.

I don't go around claiming my 150MHz VHF system is 'gigahertz domain'!!

I have no experience in ultra high frequency RF so maybe I'm missing something.