Actually when I saw the title saying ONM I automatically knew it wasn't going to be real, even if it had actually been in ONM. Why would I say such a thing about ONM?
Well ONM famously said that Mother3 was coming to GBA, it also later on listed ExciteTruck2 even though no such game ever existed. This is the first and biggest reason I would not listen to an ONM launch date. But its not the only reason, just like I would take Nintendo Power with a grain of salt. ONM and now NP are runned and written/edited/published by Future Publishing and not published or written by staff at Nintendo. As such Future is interested in what will sell the magazine not nescessarily what is fact and even when they are interested in facts Nintendo themselves is unlikely to reveal such big information exclusively to them. If a real launch date announcement was made it would be made publically and announced in various publications both on and offline ONM would never get the exclusive rights to it.
So not expecting anything I wasn't really dissapointed. Though I wonder which nut job would photoshop a document like this and release it knowing full well it would ruin his credibility. I would never fake something because once you've done it once who's going to listen to you again? Also who would waste their time knowing that everyone else is privied to the same information and within minutes a reader is going to check their copy and see its been photoshoped. Heck most just have to look at it to notice its fake.
What a waste of time and reputation.