Sadly I see too many of this... Some are outright BS. One of the reason why I started writting reviews. Examples of this was my review of Reah.

There's been times I see a real low score review, then read the description, and can't believe the disparity. Often the disappointment regarding appearance seems to weigh negatively on her performance score, which should be and is separate.

You may feel some monger is being unduly hard on a girl, but at the same time others think someone giving excessively high scores is a lapdog or a shill. Most of us will make a note not to weigh the highest and lowest scores so much, and move on.

It occurs to  me that many K-girls travel to both coasts and points in between. In NYC, the standard of care in the regular (non-GFE) KMPs has a maximum performance score of 7. When that girl changes houses or agencies (even within NYC to a full GFE place), she might adjust her game to a different standard of care where 10 is the max. Once the reviews get mixed together over time (and place) you'll see the 5/7 6/7 and 7/7s jumbled in with the 7-10/10s.  A 3-month old review with a 5-out-of-7 might be from a stint at a non-GFE house but it's hard to tell unless the review itself is very specific so it looks like a 5-out-of-10.

For a girl that stays in one location over time yea, scores can average out and guys can discount high and low scores.  But as noted levels of service can change between locations in addition to name changes.  A new girl in town with an initial mean spirited score (not truly deserved)  can have her business tank and end her tour right there, and that is usually anything less than a 7/7.  If you have a truly bad experience, sure post it, say why and give a low score (although IMHO it is better to tell the booker and work with them first).  But too often the review indicates a reasonable visit yet scores are low which in this particular area isn't fair to the girl either.

the first thing I do is look at the review history of the reviewer.   Since each hobbyist has his own criteria for scoring, whether or not a score is low is relative to the scoring system of that individual hobbyist.  For instance, if a reviewer gives a score of 6, but the highest score he has ever given is an 8, then I regard the 6 as the equivalent of an 8 when comparing it to another reviewer who has given a 10 to someone.  So a 6 is not necessarily a BS score if a particular reviewer uses an overall lower scoring system than I might use.