You can't say for sure. Even if no leaked real photo's have ever come up for past console releases, there's nothing saying that this one can't be real either. This is the first time a Nintendo console has been leaked to this extent, is it not?
Everything involving pre-release leaks and rumors can be compared to Schrödinger's cat. Just as the cat is both alive and dead, these rumors are both true and false. Until the box is opened, figuratively and literally, we can't tell.
Besides, current rumors and previous examples show that at least the first two rumors are likely... The similar build to the 360 and Spotpass, respectively.
A poster at Neogaf examined those photos and determined it was fake from the way Nintendo is printed in the image. Plus according to IGN you has broke a considerable amount of info on the device its the size of the original Xbox and looks like a updated Super Nintendo.