iPod Commercials "Mac or PC" vs "PC or Mac:"

Since iTunes and the iPod firmware were upadated to work with Wintel PCs, iPod commercials have ended with "Mac or PC" before closing with the Apple logo. We wondered why the commercial didn't use "PC or Mac" instead so it was clearer to PC users that the iPod and iTunes work with Wintels. It's a small point but we just saw a new iPod commercial near the end the Broncos-Chiefs football game where it ended "PC or Mac" so someone at the ad agency had the same vibe.