Just a bit ago, I checked on it again. Not fermenting. Uh-oh. I took a closer look at one of the empty jugs. "Ingredients: Apple Juice with up to 1% potassium sorbate added to preserve freshness." And, apparently, to frustrate my cidermaking plans. Crap. It's not even good for vinegar, and since I added yeast and left it unrefrigerated for over a day, it's neither tasty nor safe to drink.
And all because I couldn't wait 2-3 weeks for some bulk unpasteurized, preservative-free juice from a homebrew club pressing and/or bulk buy. Damned impatience.