My experience of TVs is, they're incredibly flattered to be told they're "convincing" !
That just made me think of a hilarious bit by comedian Brian Posehn on his new album where he notes that trannys don't like to be referred to as "bro" or "dude" or any other masculine identifier, because they're all about the illusion of making you think they're a woman. So it's not cool to walk up to a transvestite and say "Nice tits, tough guy!"