Brandnetel - That milk is fantastic. The yield I mentioned was for Chaource type cheese - NOT Tomme. Tomme would naturally give you far lower yield. (The harder the cheese, the lower the yield).
I am actually surprised that their milk is HTST. It sure doesn't act like it. It acts as if the process is much more gentle. The curd quality and enzymatic activity on it feel better than some raw milk I've purchased! Really? HTST???
As for the ultra pasteurized stuff; That's not small local farms like Skytop. it's the national organic brands that do that. They are monsters who jack up the price of milk for their organic claims but really practice all the stuff that the supermarket dairies do. Feed cows silage and corn instead of grass, design a flavorless diet, mix milk from thousands of cows that are hundreds of miles away and ...ultra pasteurize it to give it a 4-6 week shelf time and allow cross country trucking (forget about local) and its slower move in supermarket stocks due to its premium price. It is overly sweet and feels more like Pramalat UHT milk than real milk.. Terrible stuff. The only difference is no antibiotics and hormones used and the corn and silage feed are organic. Total scam.