According to the initial exam results, I passed the linux essentials exam with a 730 . I suppose I won't be making it official until I get the notification.
In any case, for those taking the exam, I was somewhat tempted to take the exam cold just based on my own Linux experience without studying, but thankfully, I didn't fall into that hubris. The lecture videos probably goes into more in-depth than needed; there were no questions on the OSI model though I don't regret spending the weekend memorizing the 7 layers, and a couple of questions on the exam that were decidedly a bit odd . The exam was mostly multiple choice, and there was no access to man pages or any other electronic reference. One question required text input.
Anyway, I just wanted to say that the lecture videos were very helpful, and I learned a few items that weren't on the test, but still informative. A minor victory, once it is official.