So how much does a stirplate really increase cell count? I've read some posts and literature that claim up to a 10 fold increase, but the Wyeast calculator seems to show only about a 30% increase. I've used a stirplate on all of my starters and have always had very vigorous fermentation, but I'm curious what the real effects are, and if the 30% figure is accurate, I've been grossly underpitching but still getting very good results.