Of course. It is obvious. A commercial needs to get your attention. All sources have the same range of volume they can exploit. Say, on a scale of 1 to 10, the show, if it's an action show, will plan that the most dramatic, loud sound will be at volume 10. Everything else is balanced off of that. For a commercial, they want to get your attention immediately, and wake you up if need be, so they blast the volume (and accept the clipping).