Sorry, off point there...anyways, one of the reasons for these tests is, of course, to justify the existence of the HR department. The other reason, which people never realize, is that the employer is "setting the tone" with the interview process. Indeed, one of the purposes of the interview process is to let the applicant know what the company is about. In that regard, you should pay attention to what a potential employer is trying to tell you.
Do they allow you to see the results of these tests?