OK, I see what you mean. However I would interpret the fact that people consistently ate less as strongly implying that they were less hungry in the first place

OK, I see what you mean. However I would interpret the fact that people consistently ate less as strongly implying that they were less hungry in the first place. While one individual might go around hungry, in general people don’t experience hunger if they don’t have to. I think if they had substituted “eat less” for “are less hungry” the title would be fair.