I think there is a bit of personality involved, as well. I have a friend who has no “poker face” at all. It can get her in a bit of trouble at times. I’m not sure how well she can lie because I perceive her as very straightforward, matter-of-fact and truthful… but I doubt she’s very convincing with any lie.
I don’t think it’s a skill necessarily, because my values preclude me from seeing lying as a positive (although I bet under some circumstances it may be). Taken to extreme, lying is certainly pathological.
I think lying is developmentally normal for young children who realize that they can say something (untrue) that may prevent them from facing undesirable consequences. We see children (and adults) with developmental difficulties or those on the autism spectrum who may not be very capable of lying and being generally dishonest, and they may have a hard time socially because we value certain social tendencies that are not aligned with “radical truthfulness”.