Although most rabid fanboys would love to think that Sony and Nintendo's employees loathe each other so much that they can't even bring themselves to look at a system created by their rival, that obviously isn't the case. Just like common gamers, individuals within these two great companies will have access to a wide range of systems - after all, that's the only way to ensure you stay abreast of all developments within the industry.
If you needed any more proof of this, then here it is: Shuhei Yoshida, President of Worldwide Studios, Sony Computer Entertainment has a Wii U.
Got a Wii U (US version), my Nintendo ID is "ShuYoshida", pls send me a friend request so I see you on the Activity Feed.— Shuhei Yoshida (@yosp) December 4, 2012
Yoshida later admitted that he had the machine "for research" and was even gracious enough to decline making a direct comparison between his company's PS Vita and the Wii U:
@theonlymarcos I would not compare apples and oranges— Shuhei Yoshida (@yosp) December 4, 2012
By the way, don't bother trying to add him as a friend - he appears to have blown his 100 person limit already, unsurprisingly.