I would like to share that I was able to clear the DCA exam on vSphere 5.5 yesterday. What is amazing is the efforts put by Joshua Andrews (https://www.linkedin.com/in/vjoshandrews) and his team at VMware. I was able to get my score sheet within an hour of exam completion. Main point to emphasize is that to ensure that we click the "FINISH EXAM" button in the end. This ensures that the review team is able to get back to us as fast as possible with the scores.
Joshua's blog post highlights things which an examinee should remember when s/he takes up the exam.