Quote from kut2k2:
Women have been portrayed as "dumb broads" for centuries, now they're being portrayed as smart in some commercials and you want to complain? Men still have 90+% of the power positions in politics, finance and yes even the media. Portraying a weaker person as hopelessly stupid in the media is just mean, or what Rush Limbaugh dittoheads think of as humor. It's funnier for normal people to think of the weaker person in a relationship as actually the smarter of the two, so the commercial is more attention grabbing.
It's not as if no wives were smarter than their husbands IRL. Perhaps the point is that nobody should be made to look a fool in commercials, but the admen aren't about to give up that source of humor.