This reminds me of Van Halen and their "no brown M&M's clause"

http://www.entrepreneur.com/article/232420

To sum it up, Van Halen would put in their contracts that they are to be served M&M's with no brown ones present. If they found that there was indeed brown ones, they would not play because they felt the gig was not paying attention to detail.

Seems to me that if you are applying for a job that basically is all about time (delivery in 30 mins) then it is a great litmus test to not let people who are late to the orientation have a job. These people obviously did not care enough for the job interview- It stands to reason they likely wont care to be extra fast once/if hired.