I'm pretty sure the only "sugar" in milk is lactose, so how removing the lactose only took the sugar down by 30% is beyond me. My cynical guess is that they to

I'm pretty sure the only "sugar" in milk is lactose, so how removing the lactose only took the sugar down by 30% is beyond me. My cynical guess is that they took out all the lactose, then replaced 70% of it with table sugar or HFCS. The irony there would be that, while the carton can still say 30% less sugar, they removed all of the sugar that acts nothing like fructose in humans (many people can't digest it, and those who can do so about as fast as they do protein) and replaced it with a bunch of fructose that was never there in the first place.