I'll start by saying thanks very much for the FOY opportunity. Recently I saw a note that a 2L starter made using a "vial" of yeast containing 30-60 billion cells would grow to 240 billion cells. Since the note appeared to be general, the assumption would have to be an aerated starter when made and then left to sit with no swirling or further aeration.

Some of us (or perhaps only I) are attempting to culture our yeast starters in a respiratory state (with high oxygen and low glucose concentrations). In my experience, I cannot deliver very much air to the spinner culture using an aeration stone without creating too much foam.