so I am checking out this vegas lady  - and she has 8 reviews nearly all 10 - 10 - and then I check the review history of her 9 reviewers and 90% of all their reviews for all the girls they see are 10-10  - some guys had 20 girls with that.  

Hey, it could happen.

I guess you could be referring to someone like myself. Let me preface this with I completely understand your point of view and didn't take your post to be one that is negative or bashing.  I just felt I could share my side.  I have no clue who the lady is you are mentioning, heck you may not have even noticed me! LOL

I personally do not play as much as I used to/ would like to so when I do, I see ladies I have seen before or really do my research before hand... so for the past few years, I have only interacted with wonderful woman with whom I had a blast with, hence the great scores. My only bad experiences were with flakes that actually never showed up or canceled last minute but since the site won't allow reviews for that, I could not post any...

Vegas has been blessed with a number of great looking ladies with great reviews. Sin City leads the world in stellar restaurants and escorts.  And one guy's 8 is another guy's 10. I'm pretty confident you can find a lady on the top 40 list in Vegas NTL, (after doing a little homework), who is going to provide whatever it is you happen to be looking for.

While I use the ratings as an initial critique point, I looks at the full review to see how valid the rating scores are. This is a subjective rating system here but it is probably the best out for the hobby.

sometimes I should have given a 10 but didn't I am looking at that a little different because I have met some of the friendly ladies and the rating is for service, companionship, etc and how you feel when the lady leaves I don't know about anyone else I do my most of my homework by reviews and i offer my white list for screening don't know if I getten off the subject just trying to say if she leaves    you with that wow a 10 is in order

I do a lot of research before I book with a lady. It's been worth it as every one of the ladies I've booked with have been incredible providers. That's why my reviews have high numbers. They are not a rating system for only the ladies I've seen (i.e, which of the ladies I've seen is the best I've seen then the next best, etc.), they rate the session I had with that individual lady.

Any chance at all? Lol

Hey it could happen.

All my reviews have been for the ones I really liked or really disliked so lots of 9s and 10s, and one or two 3s for service.  I've seen dozens more that I just choose not to review.  I find myself motivated to write when it's awesome or terrible and not so much when it's just ordinary.

That is where all the important information is and will give you a better sense of what your date will be like. The numbers don't mean as much as the body of the review in my opinion.  
I hope that helps!
Holly