I just brewed a tripel, and I used 2 packs of the dry Trappist yeast. It has to be the craziest fermentation I've ever seen! Ferm rate of -0.0455 per day! I wish I could upload a video, because the air lock since replaced by a blowoff tube) looks like the damn thing is boiling, and the fermentation temperature raised substantially.
I brewed it on Saturday, pitched the yeast around 6pm. As of this post (830 am Monday), my tilt hydrometer is already reading about 8% abv. I've never seen this before