Stand-up comedy, these days, is jokes about how the different races/sexes/whatever are different from the other from the stand-point of whatever race/gender/whatever the comedian is. They are also about how much sex he/she is getting/not getting.
Stephen Colbert functions in topical comedy.
EDIT: Incidentally, Topical comedy is also known as satire, and according to Wikipedia, Topical comedy is:
Topical comedy relies on headlining/important news and current affairs. It dates quickly, but is a popular form of comedy for late night talk shows.
Stand-up comedy, these days, is jokes about how the different races/sexes/whatever are different from the other from the stand-point of whatever race/gender/whatever the comedian is. They are also about how much sex he/she is getting/not getting.
Stephen Colbert functions in topical comedy.
EDIT: Incidentally, Topical comedy is also known as satire, and according to Wikipedia, Topical comedy is: