Alot of the "myth" of waiting an hour or even half hour is the fact that your hydration levels are low when you wake up and the lack of water/fluids in your body will leave your hair, stubble and scalp dry and tough, My advice, have some carbs like a banana or some oatmeal that has the carbs to help draw intracellular fluid and bananas have potassium which will help pull water into your skin and muscles and drink 32-62 oz of water, B vitamins also help...predominantly B-6 and B-5. EFA's like fish oil and flax also help with the numerous skin conditions.
I didn't remember that tip....... probably because I ignore everything the Saint says!!