99,9% of people doesn't care at all about how technically innovative something is, they only care about how useful it is. And Twitter is incredibly useful.
Did you understand what the GP meant? Yes. Did you need to point out to the world your complete mastery of the English language? No.
The GP's point was that Twitter is useful, despite it's relatively low score on "innovative new technology" scale.
I'm still skeptical and I have used it.
Of course, that woudl imply that the act of removing credibility from something would be "decrediblizaiton" or "decredencing".