No need to give the guy a hard time.
I have not researched creatine supplementation thoroughly, so please do correct me if I'm wrong here, but can somebody post an actual research article confirming the mantra that "5 grams pre and post workout" is in fact scientifically valid?
Throwing around numbers like this without any evidence needs to be avoided. Remember the old "25 grams of protein is all you can absorb per sitting" guidelines?
It seems to me that somebody with more appreciable muscle mass would need to supplement with more creatine to maintain levels in the muscle. Is there some kind of regulatory feedback system inherent in the human body (be it the body of Bill Kazmaier or a 4'2" Bangladeshi midget) that says "ok, we're at exactly 5 grams of creatine here, time to piss all the excess away"?
Creatine is dirt cheap these days, there is evidence that it has cognitive benefits, and there don't seem to be any negative side effects at reasonable dosages. Why not take more?
(As a small aside, here's an interesting article I dug up about taking 5 grams 4x per day or taking 20grams at once in regards to urinary excretion. Seems as though less is wasted at the larger dosage.