The truth is that you see the same general dynamics in any hobby related forum: an overall predominace of positive reviews, vocal skepticism of many positive reviews, enough actual shills in the mix to keep many people wondering who is a shill and who isn't, reviewers who are critical are seen as "keeping it real", negative reviews getting pushback from people who are emotionally invested in what is being criticized, negative reviews being seen as inherently credible despite the fact that many people sharing negative reviews have their own agenda, people whose review style is very fluffy and emotive, and others who are more purely utilitarian and mathematical in their approach, with the former group accusing the latter of being cold and anti-human, and the latter accusing the former of being lost in la-la land... and so on and on. I've seen variations of this play out in camera forums, headphone forums, computer forums and other places as well. I'm left to conclude that there is something inherent in human nature at work here and since human nature is as unavoidable as gravity there has to be better ways to navigate communities like this in a constructive way that does't involve constantly complaining and picking fights with people.
As others have said, when someone reviews a provider they are bringing to bear their own personal experiences, wants, needs, personality, preferences, priorioties, tastes, personal history, chemistry with the person in question and many other factors not the least of which is the sort of day both parties are having at the time-- we all have off days, and I have had a few sub-par sessions over the years due to myself having and off day, to no fault of the provider.. Further, no two people necessarily pursue this hobby for the same reasons or enjoy the same things and, taking all this together, the result is that for any one person much of what gets shared here will be unhelpful at best and outright noise or deception at worst.
Despite all that I've found this place invalueable over the years and owe many of my greatest experiences with some pretty amazing women to intel gleaned from these forums. IMHO the best way for someone to get the most out of reviews here is to pay attention to members who post somewhat regularly and who are consistent with their tastes, approach and preferences. Ideally they will be people with whom you share similar ideals and preferences-- but this isn't always the case. There is a prolific fellow in the Victoria forum whose temperament and approach is much different than my own, but nonetheless if he shares a glowing review of a provider I know with a high degree of certainty that she is someone I will want to meet.
At the end of the day the key to making the most of this place is to put the work in and figure out for yourself who to listen to and who to ingore, and this will be different for everyone. And that is fine.