Sure, no problem. I'm hesitant to post references because people have reacted badly to it in the past, but since you asked...
Tipton KD, Rasmussen BB, Miller SL, Wolf SE, Owens-Stovall SK, Petrini BE, Wolfe RR. Timing of amino acid-carbohydrate ingestion alters anabolic response of muscle to resistance exercise. Am J Physiol Endocrinol Metab. 2001 Aug;281(2):E197-206.
Showed that pre-workout whey and carb ingestion resulted in a better anabolic response than post-workout ingestion.
The reasoning isn't too complicated either. Basically, any eaten food doesn't immediately hit the bloodstream. Food is churned around in the stomach and then released into the small intestine, where absorption finally starts.
The amount of amino acids in the bloodstream is highest about 1 hour after drinking whey. With an hour workout, if you drink the whey right before, there will be the most protein in the blood right when the muscles most need it. If you drink it afterwards, there's this hour time span when the muscles need the protein and it's still caught up in various digestive processes.
The best way to do it is this:
Before workout: 20g whey
After workout: big meal with lots of slow protein (meat, eggs, milk) and both high and low GI carbs