Reality doesn't show I'm incorrect, weren't all of the first predictions 1914? Yes.
Not all of those dates are from JWs. 1914 was the first date predicted. There was no shotgun effect, here. Yes, I know they thought it was the start of Armageddon, but that doesn't change the fact that they predicted 1914 as a significant date, which it was.
Not impressed. It's not a detailed prophecy. If I said something significant would happen last Friday, would you be impressed? Probably not, unless I said an Earthquake would happen in Japan.