I'd like to see more data on the O2 requirements for a given yeast. I know Mark has mentioned the 4 categories for yeast O2 requirements but I’ve never seen a list that matches these categories to specific yeast strains.
I use the “shaken, not stirred” method for every starter now and I’ll typically give the cooled wort some jiggling/shaking for a while before pitching the yeast at high krausen. Every beer I’ve made in the OG = 1.040 - 1.060 range has turned out fine with this method. Even the times I’ve forgotten to “aerate” the wort before pitching I haven’t really noticed ill effects on moderate gravity pale ales and brown ales.
I do tend to use pure O2 through a stone on my saisons though as it seems common lore that saison yeast tend to be O2 hungry (perhaps this is huey, I don't know). Out of curiosity, I have a batch of low OG saison (~1.048) where I used the “shaken, not stirred” starter but no O2 (just shaking the cool wort before pitching) and then doing an open fermentation. Bottling that beer this weekend - we’ll see how it goes. Also really looking forward to see how the WLP585 performs compared to the 565 (thanks for that recommendation, Drew).
This is all a very round-about way of wondering: For most ale strains, if we are pitching a reasonable amount of yeast at high krausen, are there O2 requirements beyond typical splashing/shaking techniques?