To be fair, she did spend the first 11 years of her life (starting at about 15 months) living in England, so she probably does have a "naturally" english accent. However, it's probably been slightly perverted by living in the states for so long hence the "fake" soundingness of it.
@coleridge, agree she looks fantastic, but don't buy the diet line . Doesn't matter - end result is she did a great job. I particularly like the story line about how matter-of-fact she is when she defends taboo subjects and actions. She stands up for her lifestyle, and doesn't apologize for it. Very well done.
I wonder where/when S2 would be on nflx, since S1 was just five episodes.