When you get up.. your body has basically been in a starvation mode for 6-8 hours.
Does that not depend on what the individual ate before bed the previous night, what time they ate it and how long they slept for?
Gastric emptying can take upwards of 7 hours (on occasions more) depending on the food source, so the person isn' t necessarily " starving" at all.
And when people say morning is a catabolic state - hGH pulses occur during the latter stages of sleep (like the last four hours or so) - hGH being anti-catabolic in the sense that is is lipolytic and promotes glycogen storage.
And then there' s the amino pool that resides in your blood stream (and muscle tissue) which can be called upon.
Overall, i personally see morning whey shakes an unnecessary expense and should be saved for post workout recovery for financial reasons.
however, if money is no object and you need the protein, go for it.