Moving right along Tom's comment, since that is an absolutely ridiculous basis to accuse somebody of racism on, I've seen his stand-up. I just don't think he is close to Pryor or Carlin in their primes. Hell, give me early Eddie Murphy first, too.
And he did commercials back in the day. There was one for Ozark Airlines where he said "Ozark is now 75 percent transcontinental. Which is better than 75 percent trans-Atlantic." But Carlin has lost a ton off the fastball. His recent Leno appearances have been darn near unwatchable. Maybe he just doesn't have anything more to really say.
I guess some of us missed the thread about being civil on here. Or are just incapable of it. But please...continue to share your mastery of 5th-grade insults with us.