In general, Kiefer no longer recommends intra workout nutrition. However, I would imagine there are certain situations where he would.
So to re-iterate, intra workout shakes are no longer recommended. The recommendation is to keep insulin levels low during training. No food or shakes during training and the hour after training. One hour after training is when you have your PWO shake. Ideally you should take Carb Shock, but just protein powder, leucine, and some high GI carbs will work too.
As far as pre-workout nutrition, I don’t recall Kiefer ever really mentioning anything about it, but I personally think it’s best to eat your last meal 2 hours or more before training since it will keep your insulin levels low.
For more details, read his write up: https://s3.amazonaws.com/supplementblackbook.com/SBBVOL01.pdf