I'm brewing on Sunday (today is Friday), and I neglected to get my yeast (WY1056) until just this afternoon. I could make a starter, but I don't know if it would reach "high krausen" in time for pitching Sunday night. And I certainly wouldn't be able to cold crash it, as I normally do.
Or, I could just pitch the smack pack, which has a manufacture date of 13-Feb-2012. Beer Smith tells me that the yeast is 84% viable, yielding 84 billion cells. It also says that for a beer of 1.040 gravity, I need 160 billion cells. In contrast, the smack pack's instructions state that for beers up to 1.060 I don't need to do a starter.
So, who's right? Beer smith or WYEast?