Fun episode, and enjoyed the discussion over rumors. Syrenne provides a neat perspective as someone who works in the game industry.
That said, while I don't have experience in video game business, I do have a lot of experience in supplier relationships who manufacture product not just for my company, but other large OEMs. I forget who said it, but I recall hearing someone say that "Sony & Microsoft know what the NX is", seemingly implying that the developers with the NX dev kits would have possibly spilled the beans with them on what is all in the dev kit.
With the suppliers I work with, anything that isn't publicly launched yet is protected under a Non-Disclosure Agreement (NDA), a legally binding contract that essentially states nothing in the works between the two parties are to be shared with any outside party prior to it being to market. If our supplier broke that agreement and it could be traced back to them, my company wouldn't hesitate to pursue legal action with our supplier.
I understand my field is different from the video game industry, but I struggle to think that game developers would be so fast & loose with Nintendo's direct competitors with this kind of information, if not for the concerns of potential legal action, then because of the ethical ramifications of doing so. Hell, one of our suppliers has each of their production lines walled off between the customers they serve because of how important this is.