I drew the conclusion because they tried to carry the average 20 lb basewt in a circuit, that the website will say....under 12 lbs recommended, or at least it used to.
Basically same thing you see here every day, people wanting to use UL or lightweight packs, to carry fairly heavy 15-20 base weights , because they only plan to carry 3 or 4 days food.
I like my circuit to about 26. Its sucky at 31-32. In between, its varying degrees of suckiness. But...the website claims 35, and some dude on facebook said he carried 45, so people with 20lb base wts pick it to save 1lb . Even though the ULA site says...best for base under 12 lbs..or at least it used to several yrs ago.