I think one aspect of your question would be helped with understanding that a lot of the hype is a result of self-promotion. This can be accomplished by issuing press releases, hosting 'spotlight' events at a discount, etc. Which follows that there must be a reason to self-promote, i.e. business isn't great enough to not need advertising. Therefore, you could conclude that those restaurants that are as good as or better than the 'hyped' ones, makes sense. They are good enough and well attended enough to not need to shamlessly self-promote. Did you also ever notice that unless the restaurant is a landmark of some sorts, that the over-hyped restaurants are often the ones that are vacated in a few years?