Someone who has studied marketing may unconsciously evaluate every ad that they see, and after seeing enough examples, gain a strong understanding of what counts as a good ad and what counts as a bad ad.
If anything, this may be a counterexample. Consider Comic Sans: as far as I can tell, most people actually like Comic Sans. But graphic designers hate it, and the technical reasons seem overall less significant than the tribal signal. Or consider OkTrends; they launched a data-driven project to figure out what profile pictures are better, and discovered that many of the profile pictures they thought were terrible were associated with higher success.
If anything, this may be a counterexample. Consider Comic Sans: as far as I can tell, most people actually like Comic Sans. But graphic designers hate it, and the technical reasons seem overall less significant than the tribal signal. Or consider OkTrends; they launched a data-driven project to figure out what profile pictures are better, and discovered that many of the profile pictures they thought were terrible were associated with higher success.