Cider takes a long time to carbonate in my experience. Anytime I try to open a bottle of cider that has been in the bottle for less than 2 months the carbonation isn't there, or hardly there. This really shouldn't be a problem anyway, because cider should be conditioned for a long time, especally if you are hitting 14% with it, I'd say six months minimum.
Primary:Russian River Redemption clone, Kelly's Melomel, Graham's English Cider 22-23
Aging:Public House Dry Stout, Procrastination Porter, Mr. Brown Ale, Westvleteren 12 Clone, Mead, Duvel Clone, Graham's English Cider 6-21, Belgian Draak Strong Ale, Fig Melomel, Acerglyn, Restorative Tonic Metheglyn