It's possible that if you're talking to someone who's really good at NVC, it might not register as NVC at all. There might be a selection effect here. (Though I guess I could also be pulling a "no true Scotsman".)
I agree, I’m seeing selection bias in some replies. NVC, like any framework, can be applied poorly. When it is applied effectively, it just comes across as clear and direct communication.
It is not intended for casual conversation, but to provide a framework for difficult conversations to increase the chances of a positive and productive result.