On grams of protein per serving (whey) around 23 to 24 grams is a decent one (meaning one standard scoop).
If someone (Ross
) is getting 50 grams of protein in a serving that is because they have upped the "serving" amount. There is not a powdered protein in existance that can deliver 50 grams in a typical serving, which is that contained in a typical plastic scoop. GNC just in general has a bad record on all their sups...to the point where they have gotten in trouble for not meeting label amounts.