Deadwood Critique

We've obtained a copy of Deadwood, the story about a town in South Dakota during a gold rush. It's an interesting story, including Wild Bill Hickock and Calamity Jane. My advice? Swear more. A mere 75 f-bombs/(*bleep*)-suckers/c-words per hour is simply not enough.

O..M..G.. Is this the way they actually talked, or is HBO just showing it's skullduggerous side? My bet is on the latter.