The specs have been well established and photos shown, with only a few hours before the official announcement, the info is leaking everywhere. Press releases were e-mailed today but were not supposed to be released before a certain day / time, but there are too many who receive them but publish without observing the requirements.
I'm sure it will be a good camera, Nikon is very savy about testing and turning out popular bodies, and so is Canon.
Note, all the copies of the press release have been removed, there may be some somewhere, but nikon has been demanding that they be pulled until midnight.