I just brewed a 1 gal. extract batch of Chinook from Northern Brewer (1.056 OG) and it's been more than 42 hours and there is no activity at all. I've brewed 2 all grain batches (didn't take and OG reading) and they were much more active. They started fermenting right after the yeast was pitched. Question 1. Do extract batches take longer to start the ferment process? 2. How long is too long for the process to start before you should call it quits?