The Subway Threat

Well, New York City officials pretty much have no choice but to respond, whether federal officials think the threat is all that credible or not, (particularly once the press got wind.)

Here's the part I don't understand. The Post's article says that the feds think this intelligence isn't all that credible, but also says that this intelligence led to this:

CNN reported that U.S. military and other government agencies conducted a raid south of Baghdad on Wednesday night based on the same threat information passed to New York officials, rounding up al Qaeda operatives and intelligence. (My emph.)

In other words, as I read this, this supposedly non-credible intelligence has already generated a raid which did lead to the capture of al Queda operatives. Isn't that proof that there's something substantial to this material? Or is "threat information" substantively different from "intelligence?"