I know the explanation for the Voight-Kampff test: Replicants lack empathy, which can be detected by their involuntary physiological responses to certain questions/prompts.
But in the movie, it always strikes me as the opposite. The Replicants often seem more affected by the VK hypotheticals - especially those involving the mistreatment of animals.
Now, this is very much contrary to the explanations I've found (or maybe Google failed me) and, I believe, contrary to the Philip K. Dick story. But it seems to fit rather well with certain scenes:
During Leon's interrogation, he becomes upset - or acts that way - at the story of the tortoise (turtle) on its back. The soundtrack features a rapidly beating heart, which would seem to indicate that he's not faking: He's genuinely upset.
Rachel plays it icy cold, seeming unaffected by the questions. It's only when she becomes flustered at the "entrée of boiled dog" that Deckard appears to get his answer. I.e. when she does show emotion.
As Tyrell says, "'More human than human', is our motto." Animals (real ones) are mostly extinct in the Blade Runner world, or are referred to as "expensive" - they're status symbols, if anything. Doesn't seem like anyone just "likes" animals. In other words, humans have lost all notion of humanity (as it were) toward animals, while the more "pure" Replicants have retained it, which would indeed make them more human(e) than human.
In general, humans in Blade Runner seem completely jaded. For instance, Deckard (who may be a Replicant himself) is the only one affected by Zhora's, er, performance at Taffy's club. You hear people gasp, but don't see anyone else look away. The same crowd might find the boiled dog entrée deliciously decadent.
Of course, the Replicants don't seem to feel a lot of empathy towards humans, but then again that might also be cynically construed as human nature. The contradiction of a stone cold murderer also being an animal lover isn't exactly a new one. Besides, even if the Replicants feel remorse (Deckard certainly isn't too fond of his job), they are fighting for their lives and some are trained as killers, so there's that.
In all, it just seems to me that the Replicants in the movie aren't lacking in empathy - humans are. But again, everything I've found points in the opposite direction.
So is there anything to this or not? If not, how am I misinterpreting things?