The NX is like the industry's best kept secret right now. I'm still not convinced that the Eurogamer report is 100% accurate. It feels too cumbersome. I can't wait to finally know for sure!
I actually don't think the amount of information that we've had on the NX has been greatly different from any other system.
We heard mention of it early because Nintendo had wanted to please investors, but it's a given that a video game hardware manufacturer is always planning new video game hardware, so the fact that they were working on a new system shouldn't have been new or surprising. The family of systems comments was the unusual thing, since it gave us some idea of what the console would be when we normally would have just had the assumption that one would eventually be coming.
As for what we have now, we've got a bunch of information on what the system is that's been corroborated by different people. Maybe I haven't been following enough, but hasn't that been true for most recent systems?