I'll be attempting my own pre-order on Friday at my local GameStop. I get off my night shift at 7am and will probably try to grab a quick breakfast and just get in line outside the store. Hoping these reports are false, but given that it's Nintendo, I wouldn't be shocked if they turn out to be true.
It might not even be Nintendo's fault -- I could see the possibility that GameStop has a deteriorating or strained relationship with Nintendo at this point. Nintendo takes up a ton of shelf space with amiibos that don't sell well now, constantly difficult with supply when products are actually in demand, etc... And I mean, look how much GameStop really gives a crap about Nintendo? The WiiU, Wii, and 3DS shelf space COMBINED barely matches the size of the PS3 and 360 (last-gen) sections at my local store and the store I used to work at.
I bank more on Nintendo being bad with supply, though. I think GameStop would be willing to give a new platform a chance coming from any of the established manufacturers -- Sony, Microsoft, Nintendo... Just saying I wouldn't be shocked if GameStop is getting kinda sick of being one of the faces of Nintendo's supply ineptitude.