This is the first year I noticed the verbal boilerplate at the end of US political commercials states:
Group X is responsible for the content of this advertising.
compared to what I recall (and prefer) from previous years,
Group X is responsible for the content of this advertisement.
I understand advertisements to be the end result of advertising (supported here) - and my second example feels/sounds more right to me than the first.
However, I also found a number of definitions similar to the second definition on dictionary.com: paid announcements; advertisements suggesting the two words are completely interchangeable.
Is this a result of some crusade in the advertising business to change terminology, a result of the plurality of the times the advertisement is run, or am I just being overly picky and I need to get over my distinct preference for advertisement?