Not to name-drop or anything, but we met Benedict Cumberbatch once and that voice in person is just as caramel-smooth as you'd expect.
The 'Batch was on the Red Couch with fellow actor Timothy Spall and comedian Miranda Hart talking about, amongst other things, Star Wars and Trek (he may / may not be in both), when the next Sherlock series will land (2015) and the fact that he can't say the word 'penguin'.
That's right. RADA-trained Benedict Cumberbatch has trouble with the word penguin. Which he pronounced on a BBC Nature documentary as penwin.
Don't believe us? Take a look!