Out of the several brews I've done, I never used Nottingham until this past weekend when I did a Centennial Blonde with my brother and Dad. Rehydrated it, pitched at 80 (impatient), and I noticed airlock activity within 12 hours. Two days later, nothing. No airlock activity and apparently no positive pressure from the inside of the fermenter. (I pressed on lid and no bubbles.) This whole time, it's been between 63-68 in a swamp cooler.
OG was 1.042 and I'm hoping to get FG under 1.010. Is it possible that primary fermentation is already over? If so, wow, that is one fast acting yeast.