Contrary data point: in reading many of the posts on this thread, I was expecting a lag phase of 36-48 hours. I didn't see many (if any) quick starts on this yeast. That said, I have 2 batches that were pitched at 3:30 AM on Saturday morning, and by 3:00 Saturday afternoon, I had Krausen. It caught me by surprise. The only reason I even checked was because I was checking the gravity of a hard cider I'm brewing. I quickly affixed a blowoff to my 5 gallon carboy due to minimal headspace, and was thankful. Both started at the same time, and look to finish at the same time. Granted, both brews are sessions, weighing in at 1.042 each.
If they turn out decent, I may have to pick a few more of these packets up for future brews.
It is just about the ugliest start to fermentation ever. The yeast stratified at the bottom, then rose to the top in a diarrhea like clump. Then the whole thing fell apart and is now swirling around in the fermentor like a flushed toilet after a night of heavy drinking after a chili cook-off. Happily, it doesn't smell that way. ;-)