No, it's not. He's referring to what people believe their perceptions are, not the actual truth of their perceptions. Fifty brought in the black coffee example, in which people objectively did not receive as much pleasure in black coffee as opposed to coffee with sugar and milk through studying their pleasure centers, despite the insistence of those very same people that they thought black coffee was superior, because they thought that it was supposed to be superior. It has nothing to do with the popular opinion of what is beautiful/tasty. It's also a completely irrelevant comparison when we're talking about facts not relating to the nature of the human species.