Does it really make a difference? I doubt something like controller design will lead people to leave Nintendo and join Sony. Furthermore, although I haven't seen the controller myself, this is how ideas tend to work. If there's a great idea out there, others will follow its example. They become influenced by it. That's just, y'know, how society tends to progress and develop over time. Honestly, I think it should make Nintendo people happy, as they would know they're on the right track if other people are attempting to mimic them.
And honestly, even if all the above wasn't true, it's still a fantastically minor issue. Don't let something this small bother you.