All the reviewers are paid to say the samething about the speakers else they will be ruining their career. Its their bread and butter and everything is fare in love and war. If some one pays me xxxxxxxxxxxxx amount of money then probablly i too will have something to say good about any product. Its business and that's how it works even if it tough for you to digest.
You can fool some of the people some of the time... not all of the people all of the time. If what you say is true then those reviewers will only be hurting themselves and very soon. C'mon who wants to buy something based on a review and then never buy anything else that reviewer recommends.
Their bread and butter is repeat customers buying based on their reviews because they have found their reviews to be true and not the other way around. Reviewers lying about reviews is the fastest way to ruin their careers. How many of us have been cheated (I'm sure all of us)... how many of us bought something again from the person who cheated us (I'm sure none of us).