Yes, Facebook ads get some exposure by people clicking on them. But the question is, do they get as much attention as others ads such as on Google AdWords, probably not.
The reason Google ads get more clicks is because if someone clicks on an ad from there, they more than likely came to there to search for whatever ads they are clicking on anyway and are more serious about buying your product or service. Facebook ads are clicked maybe just because they happen to be there at the right time, not because the person is interested in spending any money.
