I brewed a saison two weeks ago. My initial gravity was 1.045 and I added a pound of sugar after three days, which should have taken the gravity to about 1.054ish. As expected, the yeast woke back up for a day or two, and then seemed to settle down. Well, last night I noticed a bubble in my airlock and checked the gravity. A few days ago it was 1.010, and now it's at 1.006. This is going to be a dry beer. That's an apparent attenuation of 88%!