I heard some talk on this topic about reviews... so, what makes a reviewer? What makes a critic? Is it experience? Schooling? Longevity?
I review books. Bottom line is my opinion. I don't think that really changes if a reviewer works for the New York Times. Maybe because they work for the NYT their reviews are more widely read or accepted, but the bottom line is still their opinion. Two people, equally read, equally educated could have two completely different opinions about an apparent 'classic' book...or where to find the best steak in Chicago.
People are only going to follow a reviewer if they find that their tastes are similar.