[Regardless of what I think about some of the fall pilots, there are three comedies that each deal with prominent cultural stereotypes to very different degrees. Rather than review them individually (I’d be overly mean to some of them if I did), I figure I’d run them down in relation to their ability to deal with these sensitive cultural issues.]
Cavemen (ABC)
Culture in Question: Prehistoric Man (Cavemen)
Yes, Cavemen deals with the stereotyping of a non-existent culture, and there is a distinct problem with this: the writers are not capable of forgetting real cultural stereotypes in the process. The entire series basically boils down to stealing every single African-American sitcom joke and just transferring it to these hairy neanderthals. The Cavemen feel out of place at a country club, they feel that their crime is more reporter than white crime, and they worry about interracial marriage.
Cultural Impact: Setting the clock back decades. By presenting a culture of exclusion to a level not seen since the 70s, it’s basically making North America out to be this cultural dead zone incapable of accepting other cultures. And while racism is still a serious issue, ignoring any of the past three decades of advancement is just insulting to the efforts of the civil rights movement.
The Big Bang Theory (CBS)
Culture in Question: Geek Culture
While certainly not attempting to prescribe a moral to the state of geek culture, The Big Bang Theory does attempt to represent it. In the process, however, the geek turns into a complete sitcom stereotype: they play World of Warcraft, they watch Battlestar Galactica (w/ Commentary) and they don’t know how to talk to girls. This, in the mind of sitcom writers, is a geek in a nutshell.
I’ve talked about why canceling Jericho was 
Cultural Learnings 